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Journal articles on the topic 'Geodetic research'
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1
Wang, Y. S., P. Zhang, X. Q. Wang, and Z. Y. Wang. "RESEARCH AND IMPLEMENTATION OF GEODETIC DATABASE SYSTEM." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W10 (February 8, 2020): 1183–87. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w10-1183-2020.
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Abstract. With the gradual formation of the space technical system of National Geodetic Datum, the storage management and application services of the geodetic data have been developing rapidly. This paper studies Geodetic data content, characteristics, classification principles and classification methods in the geodetic technology system and initially forms a standard classification system of geodetic data. On the basis of studying the key technical links to the modern Geodetic Datum comprehensive data acquisition, storage, management and service, this paper has tackled the real-time data optimal storage based on DBFS technology. Technical problems such as multi-dimensional data integration and docking of the software, building a safe and standardized management and the geodetic data service system, coordinating the application of network resources, storage resources, computing resources and other soft and hard environment elements, achieving efficient management and service of land, sea and air integrated observation data results, greatly improving the management ability and application service level of Geodetic data, for surveying and mapping. Business operation of the benchmark database provides support and promotes the social application on geodetic results.
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Nikonov, A. V., E. I. Dolgov, and S. V. Sergeev. "Sergej Jakovlevich Belykh, Siberian surveyor, Tutor, Military Topographer (120th birthday anniversary)." Geodesy and Cartography 979, no. 1 (February 20, 2022): 54–64. http://dx.doi.org/10.22389/0016-7126-2022-979-1-54-64.
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The paper is about Sergey Yakovlevich Belykh (1901–1963), a practitioner, teacher and military topographer who made a significant contribution to the development of higher geodesic education in Siberia. Information on the activities of the Higher Geodetic Department in Siberian Field District, where S. Y. Belykh worked after graduation from the Geodetic Faculty of Omsk Agricultural Academy in 1922 is presented. It is told about the arrangement of the Siberian Astronomic-and-Geodetic Institute in Omsk. Novosibirsk Institute of Engineers of Geodesy, Aerial Photography and Cartography (NIIGAiK), was subsequently formed there. The difficulties that the young geodesic university faced in 1940–1950 were highlighted. S. Y. Belykh’s military service in the Red Army Military Topographic Service (MTS) troops including work in the Scientific Research Institute of the MTS is described. There is information on colleagues of S. Y. Belykh and fragments of his daughter’s recollections.
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Rubtsov, Igor, and Oleg Rubtsov. "Geodetic monitoring of deflections of reinforced beams and reinforcing elements under variable static loading." E3S Web of Conferences 164 (2020): 08026. http://dx.doi.org/10.1051/e3sconf/202016408026.
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In the framework of the present study was carried out monitoring of reinforced concrete structures subjected to reinforcement. As reinforcement elements, steel channels were used, rigidly connected to a reinforced concrete beam to be reinforced. Object of research: systems of quasi-continuous observations of the parameters of the construction object carried out on the basis of the monitoring system. Subject of research: identification of the possibility of using various systems, in particular, geodetic and strain gauge monitoring, to monitor the bending of reinforced concrete elements and, in particular, reinforced concrete beams. Aim: Comparative analysis of strain gauge and geodetic monitoring in the process of fixed changes in static loads on structural elements. Materials and methods: the initial materials for this study were the results of geodesic and strain gauge monitoring during statistical step-by-step loading of reinforced concrete beam by steel channels. Results: on the basis of the obtained dependences of the deflection of elements of reinforced and reinforcing structures in time during their step-by-step statistical loading the possibility of using geodetic control is shown. Conclusions: The possibility of using geodesic and strain gauge methods for monitoring reinforced concrete structures is proved.
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Salamatina, Yu M., and S. I. Kuzikov. "RESEARCH OF POSITIONING ACCURACY BASED ON PHOTOGRAMMETRY." Herald of KSUCTA n a N Isanov, no. 1-2020 (April 6, 2020): 73–79. http://dx.doi.org/10.35803/1694-5298.2020.1.73-79.
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The methods of ground and space geodesy allow to determine with millimeter accuracy the position of separate geodetic points on the Earth's surface. The hardware and software of the photogrammetry method make it possible to build a 3D digital model of the observed geodetic area. The purpose of this work is to compare and evaluate the accuracy of relative positioning using geodesy and photogrammetry methods within the Bishkek geodynamic area.
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Sina, Bledar. "Building the Geodesic Network for the City of Gramsh through GNSS Surveys." International Research Journal of Innovations in Engineering and Technology 08, no. 03 (2024): 59–63. http://dx.doi.org/10.47001/irjiet/2024.803008.
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This study presents the methodology and results of establishing a geodesic network for the urban area of Gramsh, Albania, utilizing Global Navigation Satellite System (GNSS) surveys. The development of an accurate geodetic framework is essential for various applications including urban planning, infrastructure development, and cadastral mapping. The research focuses on deploying GNSS receivers strategically across Gramsh to collect precise positioning data, which is subsequently processed using differential correction techniques to achieve centimeter-level accuracy. Ground control points are established throughout the city to facilitate georeferencing and validation of the network. Additionally, quality control measures such as redundancy checks and error analysis are implemented to ensure the reliability of the geodesic network. The resulting network provides a reliable spatial reference system for the city of Gramsh, enabling efficient and accurate geospatial data collection, analysis, and decision-making processes for urban development projects. This study demonstrates the effectiveness of GNSS surveys in establishing geodetic infrastructure in urban environments and highlights their significance in supporting sustainable urban growth and management.
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Hagen, Rick A., Heinrich Hinze, Jürgen Monk, Fred Niederjasper, Hans Werner Schenke, and Tilo Schöne. "Applied marine geodetic research in polar regions." Marine Geodesy 17, no. 2 (April 1994): 81–94. http://dx.doi.org/10.1080/15210609409379716.
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TREVOHO, I., A. DRBAL, E. ILKIV, and M. GALYARNYK. "Research of technical characteristics of wall leveling signs in the context of the ethymology of terms." Modern achievements of geodesic science and industry 41, no. I (April 1, 2021): 55–60. http://dx.doi.org/10.33841/1819-1339-1-41-55-60.
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The aim is to clarify the etymology of the terms “wall leveling mark” and “wall leveling benchmark” in the context of the historical sequence of the appearance of leveling networks in the Ukrainian lands to present the author’s view on these definitions in scientific reference and encyclopedic geodetic literature. To conduct a chronological study of the phenomenon of leveling wall signs of different structures and the corresponding technologies of binding to them in leveling networks, which were created in the Ukrainian lands during the XIX–XXI centuries. Pay attention to the fact that level marks and wall frames, which are valid (working) independent geodetic signs in leveling networks, due to long-term operation are carriers of important geodetic information. Method. To study the results of the analysis of historical sources, standards, reference, encyclopedic and scientific literature in the context of the analysis of the definitions of “level mark” and “wall benchmark” was used analysis of patterns of functioning of the relevant geodetic terminological units. Results. On the territory of Ukraine during the XIX–XXI centuries. Created a leveling (height) network [State Geodetic Network, experimental operation], which operates to this day. The functioning of the leveling (height) network is regulated by legislative acts and regulations. Thanks to the geo-portal of the DGM of Ukraine created by NDIGK, it is possible to obtain information about the preserved level signs. The peculiarity of the leveling (height) network is that it was created by different departments of different countries [Glushkov V.V., 2003] with different height systems and taking into account the access of Ukrainian lands to the Black Sea. All this led to the use of different designs of wall leveling signs and, accordingly, their interpretation, which is not sufficiently reflected in the geodetic reference and regulatory literature. Scientific novelty. The performed comprehensive analysis of information sources can serve as a basis for development of scientific and technical recommendations formonitoring of level signs ofDGMofUkraine and will allow to reveal weaknesses of their functioning which are caused by changes in vital activity of the city environment. The practical value of the work is to solve the problem of distinguishing the production characteristics of the wall leveling mark and wall leveling benchmark, which are fixed leveling signs in geodetic networks of thickening and leveling networks to develop technical developments for inspection and updating points II, leveling networks classes and geodetic networks of thickening in the context of monitoring of geodetic points of DGM of Ukraine and their corresponding representation in the scientific and reference geodetic literature.
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Trevoho, Ihor, Valery Riabchii, and Vladyslav Riabchii. "Research of Compatibility and Systemity of Land Management Terminology." Baltic Surveying 9 (December 5, 2018): 63–68. http://dx.doi.org/10.22616/j.balticsurveying.2018.020.
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The analysis results of common terms in land management and their interpretations in normative-legal acts of Ukraine are presented. It have been established collisions and significant differences in the wording of even such common terms as a land parcel, a boundary of land parcel, a size of land parcel, etc. The purpose of the study is to identify collisions and contradictions of some key terms used in land surveying and geodetic works, as well as development of concrete proposals for improving and perfection the relevant terms. For this purpose, the following tasks were set and solved: analysis of regulatory legal acts of Ukraine concerning the conceptual apparatus of land management, systematization and generalization of substantiation results of the relevant terms correction need, development of proposals taking into account works content on land management and geodetic works for information provision of the State Land Cadastre. In the course of the study, the comparative method of analysis and the systematization of inconsistencies in the current normative legal acts of Ukraine regarding the terms and their interpretation are used. During the proposals development, known approaches "from general to partial" and vice versa were used. The established disadvantages do not allow unambiguously interpreting and performing such important work as geodetic setting or restoration of the land parcels boundaries, resolution of land disputes between adjacent users of land parcels. Completed summaries of content and wording of the relevant terms justify a need for correction of the terms and additions to their definitions. It was set the features of each term. As a result of integrated approach to solution of the existing problem and systematization of established differences, the general wording and detailed specification of the analyzed terms interpretations are proposed. Knowledge of technological stages for geodetic and land management works provided an opportunity to improve the geodetic information support of the State Land Cadastre. The proposals for correction of the studied terms eliminate existing contradictions, provide an unambiguous interpretation of land management terminology, which leads to the exact execution of geodetic and land management works, and, accordingly, obtaining reliable information for the State Land Cadastre.
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HORB, O., I. TREVOHO, V. TARNAVSKYY, and S. NESTERENKO. "Geodesic assurance of the Kharkiv “Nikolsky” shopping mall restoration." Modern achievements of geodesic science and industry 1, no. 47 (April 1, 2024): 29–35. http://dx.doi.org/10.33841/1819-1339-1-47-29-35.
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The application of geodetic surveys is a vital aspect of assessing the destruction of buildings as a result of Russian armed aggression. The study compares Ukrainian and foreign research methods, highlights their advantages and disadvantages. The legislative framework for geodetic support for restoration of buildings on the territory of Ukraine has been analyzed. As international experience has shown, geodetic surveys are an effective tool for assessing the destruction of buildings as a result of military operations. The study is aimed at evaluating the structural integrity on the example of the shopping and entertainment center “Nikolskyi” in the city of Kharkiv. Geodetic methods used to assess structural damage are reviewed, and an overview of the results of these damage assessments is provided. It is investigated how geodetic surveys can be used to assess structural damage in buildings. The purpose of the article is the study of geodetic works and methods of geodetic support for restoration works of the shopping center building. To achieve the goal, the following tasks were performed: analysis of previous experience in this area; the choice of the method of geodetic provision of restoration works; presenting the results of geodetic measurements; interpretation of the obtained results. Method. To obtain research results, special methods are used: constructive and substantive analysis – for the formation of research directions; analytical methods – to process the results of the shooting; mathematical modeling – to determine the amount of destruction and damage to the building. A Leica Geosystems TCRP 1205 tacheometer and other geodetic equipment were used in the study to assess the structural integrity of the shopping center. The combination of geodetic measurements with the use of tacheometers is an important area of application of tacheometers in similar tasks. In addition, classical surveys, using total station geodetic measurements, were performed in conjunction with an automatic strain monitoring system to ensure the accuracy and reliability of the structural integrity assessment. Therefore, using the specified devices, it is possible to accurately measure and analyze the structural integrity of the shopping center. Scientific novelty and practical significance. The scientific novelty of the conducted research consists in the creation of modern approaches to geodetic support for restoration works of buildings that were destroyed as a result of military operations. Original methods of geodetic surveying and a modern instrument base from NVP “Navigation and Geodetic Center” are applied. The proposed geodetic studies demonstrate the effectiveness of using geodetic measurements to assess structural damage to buildings. Deformation values obtained with the help of geodetic studies helped determine the volumes and technology of restoration, which provides important information for engineering works. It has been shown that the use of electronic tacheometer measurements is a reliable and accurate means of determining damage levels and locations even in complex fracture locations. The Leica TCRP 1205 total station accurately measures angles and distances in a reflection-free mode to achieve the highest accuracy of work. In addition, the measuring technology that was applied at the object of research can be used for geodetic research during the detection of shifts and deformations of building structures. Future research could explore the application of geodetic measurements to other types of buildings or structures damaged by military action. In general, the studies carried out reinforce the potential and importance of geodetic measurements for restoration programs that are planned and will be planned in the near future.
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Mazurov, B. T. "Geodynamic systems (qualitative research rotational movements)." Geodesy and Cartography 919, no. 1 (February 20, 2017): 35–39. http://dx.doi.org/10.22389/0016-7126-2017-919-1-35-39.
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Geodetic data and their subsequent statistical analysis enable mathematical modeling and identifying the stress-deformed state of geodynamic systems in concern to the aspect of natural and man-made disasters prediction. Geodetic monitoring geodynamic processes is necessary for solving a number of scientific and practical tasks of geodesy i.e. expanding and maintaining the national geodetic network, studying changes in gravity field in time, using GNSS technology. Most important extension of research is mathematical modelling of geodynamic systems in a predictive order. To study the complex (nonlinear) geodynamic processes the appropriate mathematical framework should be selected. Here are theoretical foundations for studying rotation movements of the earth’s surface. A mathematical model of rotary circular structures of the Earth was mentioned. There are mathematical models explaining the nature of sudden global, regional and some local geodynamic processes. They are based on differences in temporal and spatial scales, of geodynamic systems. Theoretical bases of description rotational motions on a plane by a system of differential equations were considered. Some examples of integral curves were given. They can be qualitative characteristics of geodynamic systems. In many cases, a similar trajectory corresponds to the rotational horizontal movements of the earth’s surface.
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Mamonov, Kostyantin, Maksym Kukhar, Ernest Shterndok, and Svitlana Kamchatna. "Standardization of geodetic data for determination of boundaries of natural reserve areas." E3S Web of Conferences 452 (2023): 03001. http://dx.doi.org/10.1051/e3sconf/202345203001.
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The research aims to analyze geodetic methods for determining the location of natural reserve areas and standardizing the obtained data. The object of the research is the standardization of geodetic data for determining the boundaries of natural reserve areas. Normative and legal documents related to the classification and determination of territories of natural reserve areas and the main geodetic methods used to determine the boundaries of such areas were analyzed in the article. The structure and description of the main geodetic methods for the practical implementation of work to determine the location of natural reserve areas, including geodetic measurements, global navigation, and remote sensing methods, were also discussed. In addition, a number of discrepancies were identified in the process of obtaining, storing, and reproducing geodetic data. Overall, the article contains important information about methods for determining the boundaries of natural reserve areas and how mathematical methods can be used to standardize geodetic data by formalizing it. The research showed that formalization of geodetic data can be done using mathematical methods such as mathematical logic, Boolean algebra, and category theory. The article proposes the use of mathematical methods of data formalization, such as mathematical logic, Boolean algebra, and category theory, to structure and standardize geodetic data. Analytical and graphical models for standardizing geodetic data for determining the boundaries of natural reserve areas were developed using mathematical methods of formalization such as mathematical logic, Boolean algebra, and category theory.
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Thevoho, I., P. SUKHIY, S. BILOKRYNYTSKIY, and K. DARCHUK. "Geodetic support of the territory of Chernivtsi oblast (history, current state)." Modern achievements of geodesic science and industry 1, no. 43 (April 1, 2022): 41–47. http://dx.doi.org/10.33841/1819-1339-1-43-41-47.
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Purpose. The purpose of the research is to substantiate the theoretical and scientific-methodical bases of the importance of geodetic support of the territories of the regions, to assess the possibility of creating topographic maps and plans of one or another scale on the existing geodetic network. Methods. To achieve the purpose of the research, the following methods and techniques were used: historical analysis (to study the history of geodetic support), geodetic (to determine the required density of geodetic points when conducting topographic surveys without violating regulations), mathematical (to determine the completion of the geodetic network, assessments of the possibility of creating topographic maps and plans for a particular area), methods of cartography (to display the points of geodetic support) and others. Results. The history of research of geodetic support of the regions of the territory of Ukraine is hundreds of years old, but only, in our opinion, in recent years (the years of independence of Ukraine) they have acquired a scientific character. The analysis of geodetic support of the territory of Chernivtsi oblast is carried out. The possibility of creating topographic maps and plans on the existing geodetic network has been assessed. To create topographic maps and plans in accordance with the requirements of regulations, the necessary completion of the geodetic network on the territory of Chernivtsi oblast is calculated. Scientific novelty. The history of geodetic support of the territory of Chernivtsi oblast is supplemented by its current state, which is based on the “Basic provisions of the State Geodetic Network of Ukraine” of 1998, which in 2013 were replaced by “Procedure for building the State Geodetic Network”. On the basis of the current DGM, the possibility of creating topographic maps and plans was assessed. The completion of the points of the geodetic network is calculated according to the requirements of normative documents. Practical meaning. Theoretical generalizations, methodical receptions of the conducted researches can be used during carrying out similar researches in other regions, and concrete results of researches – by the organizations, enterprises, departments which carry out geodetic works in the territory of Chernivtsi oblast.
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Pleterski, Žan, Klemen Kregar, and Tilen Urbančič. "Geodetic datum determination for the Urbas landslide geodetic network." Geodetski vestnik 66, no. 04 (December 2022): 536–52. http://dx.doi.org/10.15292/geodetski-vestnik.2022.04.536-552.
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This article describes the geodetic network of the Urbas landslide. It is the largest landslide in the Koroška Bela region, which, if triggered, can endanger human lives and damage infrastructure. In order to monitor the landslide, a geodetic network was established in the area of the Urbas landslide, on the basis of which the movements of control points can be calculated. After various analyses, only two small areas near the Urbas landslide proved to be stable, so we established four reference points there. In this research we defined the geodetic datum of the geodetic network of the Urbas landslide. The geodetic datum was defined on the basis of four measurement epochs processed with our own software.
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Mazurov, Boris T., Andrey A. Panzhin, and Dinara A. Abzhaparova. "ASSESSMENT OF THE GEODYNAMIC SITUATION OF THE VORONEZH CRYSTALLINE MASSIF FROM GEODETIC DATA." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 26, no. 5 (2021): 17–26. http://dx.doi.org/10.33764/2411-1759-2021-26-5-17-26.
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Repeated geodetic measurements allow you to evaluate such geodetic elements as coordinates, heights, and directions. And also represent discretely the field of displacement vectors of geodesic points. The obtained vectors allow us to determine the stress-strain state of the earth's surface according to the accepted model. There is a reasonable opinion about the significant presence of rotational (vortex) movements in geodynamic processes. Here, the corresponding algorithms are used for the territory of the Voronezh Crystal massif. Separately, it is possible to calculate the differential characteristics of the vector field, called divergence (div) and rotor (vortex, rot, curl). The article proposes to determine the rotor field from discrete geodetic observations of displacement vectors on the surface of the studied territory. The most important continuation of this research work is the method of mathe-matical modeling of geodynamic systems for predictive purposes. For the study of complex (nonlinear) geodynamic processes, an appropriate mathematical basis should be chosen. Here, attention is drawn to the involvement of the mathematical foundations of field theory. To evaluate the characteristics of vector fields when using repeated geodetic measurements, the method of finite elements can be used. Dividing the territory under study into triangles allows us to determine the deformation characteristics after calculating the elements of the strain tensor. In particular, the value of the angular velocity of the triangle rotation relative to its center of gravity is found. Next, it is easy to calculate the value of the rotor. The example given in the article of real geodetic observations on the Voronezh crystal massif confirms the possibility of predicting the location of an upcoming seismic event – an earth-quake.
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Thevoho, I., I. TSIUPAK, O. VANCHURA, and B. CHETVERIKOV. "25 years of Yavoriv SGP – structure, usage, research scope, prospects." Modern achievements of geodesic science and industry 1, no. 47 (April 1, 2024): 44–50. http://dx.doi.org/10.33841/1819-1339-1-47-44-50.
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This paper presents detailed information about the stages of creation and directions of use of a special multifunctional standard scientific geodetic polygon (SGP) in Yavoriv district of Lviv region. The main purpose of the SGP is the metrological control of modern geodetic instruments and the testing of new technologies. The features of constructing geodetic networks, creating a local reference gravimetric network to refine the parameters of the global Earth gravimetric model, and constructing a quasi-geoid model with centimeter accuracy within the local polygon are described. The determination of high-precision astronomical coordinates and reference azimuths with an accuracy of 0.5–1.0, the creation of metrological objects of the NGP are outlined: the standard linear baseline (SLB) of original design and the fundamental geodetic network (FGN) for conducting special research and metrological verification of electronic theodolites, rangefinders, GNSS receivers, the development of a high-precision leveling network for studying accuracy and GNSS-leveling, etc. It provides information about multi-year experimental calibrations of the SLB using various methods and devices, and the first international intercomparisons on the SLB (working standard) in Ukraine, as well as multi-day GNSS observation campaigns at FGN points, the results of processing, and the achieved high accuracy. New experimental studies are related to improving the accuracy of FGN and GNSS leveling, new calibrations of SLB, including international intercomparisons, establishment of fundamental gravimetric points, optimization of the use of reference directions for metrological control and calibration of navigation equipment.
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Brzeziński, Aleksander, Marcin Barlik, Ewa Andrasik, Waldemar Izdebski, Michał Kruczyk, Tomasz Liwosz, Tomasz Olszak, et al. "Geodetic and Geodynamic Studies at Department of Geodesy and Geodetic Astronomy Wut." Reports on Geodesy and Geoinformatics 100, no. 1 (June 1, 2016): 165–200. http://dx.doi.org/10.1515/rgg-2016-0013.
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Abstract The article presents current issues and research work conducted in the Department of Geodesy and Geodetic Astronomy at the Faculty of Geodesy and Cartography at Warsaw University of Technology. It contains the most important directions of research in the fields of physical geodesy, satellite measurement techniques, GNSS meteorology, geodynamic studies, electronic measurement techniques and terrain information systems.
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Mazurov, B. T. "An algorithm for estimating the vector fields` curl of the earth’s surface motion from geodetic data." Geodesy and Cartography 949, no. 7 (August 20, 2019): 51–56. http://dx.doi.org/10.22389/0016-7126-2019-949-7-51-56.
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According to the changes of geodetic elements (coordinates, heights, directions) after multiple measurements, it is possible to represent the field of geodetic points’ displacement vector. When studying the stress-strain state of the earth’s surface, the vectors obtained can be used not only to calculate the earth’s deformation tensor in the area under study, but also the differential characteristics of the vector field, called divergence and rotor (vortex, curl). The author proposes the way to determinethe rotor according to discrete geodesic observations of displacement vectors on the surface of the surveyed area. The most important continuation of this research work is the method of geodynamic systemsmathematical modeling for predictive purposes. In order to study the complex (nonlinear) geodynamic processes, an appropriate mathematical basis should be chosen. Here the attention is drawn to the attraction of the mathematical foundations of field theory. The variants of the curl definition are proposed – one of the vector fields’ differential characteristics. To assess the characteristics of vector fields when using multiple geodetic measurements, the finite element method can be used. The division of the surveyed area into triangles enables you to determine the characteristics of the deformation after calculating the elements of the strain tensor.
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Rizos, C. "Network RTK Research and Implementation: A Geodetic Perspective." Journal of Global Positioning Systems 1, no. 2 (December 31, 2002): 144–50. http://dx.doi.org/10.5081/jgps.1.2.144.
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Celms, Armands, Velta Parsova, Ilona Reke, and Janis Akmentins. "Tendencies of development of local geodetic network in Riga city." Baltic Surveying 9 (December 5, 2018): 8–15. http://dx.doi.org/10.22616/j.balticsurveying.2018.013.
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Local geodetic network is very important in harmonic development of city territory. On the base of the local geodetic network, cadastral and topographic surveying works, engineering geodetic works and executive measurements of newly built buildings and engineering networks are carried out. In the territory of Riga, the local geodetic network was started to create in 1880, and in the course of time, as the city expanded, necessity to have wider reference network emerged. In 2005, in the territory of Latvia, network of continuously working base stations LatPos was launched, which ensured completely new trends in execution of measurements and accuracy reached. One year later, base station network EUPOS-RIGA was launched in the territory of Riga. It can be regarded as consistent part of Riga local geodetic network. The purpose of the research was to state, what are differences between historically used coordinates of points of the local geodetic network, and coordinates that are determined by use of real time corrections of LatPos and EUPOS-RIGA base station network. Measurements were made in the territory of Riga in period from December 2016 until April 2017. In the framework of the research, 61 point of the local geodetic network was inspected and in 38 cases GNSS observations in RTK mode were completed. In the research, catalogues of coordinates of polygonometry points of sixties and eighties were used in order to compare what differences of coordinates existed historically. The main conclusion drawn during the research – historical points of the local geodetic network shall not be used for surveying works of any kind before improvement of them and before they comply with requirements of normative acts.
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Zhang, Q., P. Zhang, Z. Sun, F. Wang, and X. Wang. "RESEARCH IN APPLICATION OF GEODETIC GPS RECEIVERS IN TIME SYNCHRONIZATION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3 (April 30, 2018): 2283–86. http://dx.doi.org/10.5194/isprs-archives-xlii-3-2283-2018.
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In recent years, with the development of satellite orbit and clock parameters accurately determining technology and the popularity of geodetic GPS receivers, Common-View (CV) which proposed in 1980 by Allan has gained widespread application and achieved higher accuracy time synchronization results. GPS Common View (GPS CV) is the technology that based on multi-channel geodetic GPS receivers located in different place and under the same common-view schedule to receiving same GPS satellite signal at the same time, and then calculating the time difference between respective local receiver time and GPST by weighted theory, we will obtain the difference between above local time of receivers that installed in different station with external atomic clock. Multi-channel geodetic GPS receivers have significant advantages such as higher stability, higher accuracy and more common-view satellites in long baseline time synchronization application over the single-channel geodetic GPS receivers. At present, receiver hardware delay and surrounding environment influence are main error factors that affect the accuracy of GPS common-view result. But most error factors will be suppressed by observation data smoothing and using of observation data from different satellites in multi-channel geodetic GPS receiver. After the SA (Selective Availability) cancellation, using a combination of precise satellite ephemeris, ionospheric-free dual-frequency P-code observations and accurately measuring of receiver hardware delay, we can achieve time synchronization result on the order of nanoseconds (ns).<br> In this paper, 6 days observation data of two IGS core stations with external atomic clock (PTB, USNO distance of two stations about 6000&thinsp;km) were used to verify the GPS common-view theory. Through GPS observation data analysis, there are at least 2&ndash;4 common-view satellites and 5 satellites in a few tracking periods between two stations when the elevation angle is 15&deg;, even there will be at least 2 common-view satellites for each tracking period when the elevation angle is 30&deg;. Data processing used precise GPS satellite ephemeris, double-frequency P-code combination observations without ionosphere effects and the correction of the Black troposphere Delay Model. the weighted average of all common-viewed GPS satellites in the same tracking period is taken by weighting the root-mean-square error of each satellite, finally a time comparison data between two stations is obtained, and then the time synchronization result between the two stations (PTB and USNO) is obtained. It can be seen from the analysis of time synchronization result that the root mean square error of REFSV (the difference between the local frequency standard at the mid-point of the actual tracking length and the tracked satellite time in unit of 0.1&thinsp;ns) shows a linear change within one day, However the jump occurs when jumping over the day which is mainly caused by satellites position being changed due to the interpolation of two-day precise satellite ephemeris across the day. the overall trend of time synchronization result is declining and tends to be stable within a week-long time. We compared the time synchronization results (without considering the hardware delay correction) with those published by the International Bureau of Weights and Measures (BIPM), and the comparing result from a week earlier shows that the trend is same but there is a systematic bias which was mainly caused by hardware delays of geodetic GPS receiver. Regardless of the hardware delay, the comparing result is about between 102&thinsp;ns and 106&thinsp;ns. the vast majority of the difference within 2&thinsp;ns but the difference of individual moment does not exceed 4ns when taking into account the systemic bias which mainly caused by hardware delay. Therefore, it is feasible to use the geodetic GPS receiver to achieve the time synchronization result in nanosecond order between two stations which separated by thousands kilometers, and multi-channel geodetic GPS receivers have obvious advantages over single-channel geodetic GPS receivers in the number of common-viewing satellites. In order to obtain higher precision (e.g sub-nanosecond order) time synchronization results, we shall take account into carrier phase observations, hardware delay ,and more error-influencing factors should be considered such as troposphere delay correction, multipath effects, and hardware delays changes due to temperature changes.
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Iršič, Vesna, and Sandi Klavžar. "Strong geodetic problem on Cartesian products of graphs." RAIRO - Operations Research 52, no. 1 (January 2018): 205–16. http://dx.doi.org/10.1051/ro/2018003.
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The strong geodetic problem is a recent variation of the geodetic problem. For a graph G, its strong geodetic number sg(G) is the cardinality of a smallest vertex subset S, such that each vertex of G lies on a fixed shortest path between a pair of vertices from S. In this paper, the strong geodetic problem is studied on the Cartesian product of graphs. A general upper bound for sg(G □ H) is determined, as well as exact values for Km □ Kn, K1,k □ Pl, and prisms over Kn–e. Connections between the strong geodetic number of a graph and its subgraphs are also discussed.
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Faiziev, Sh, U. Ibragimov, Z. Kilichev, H. Suyunova, and A. Hakkulova. "Comparison and verification of research results of geodesic works carried out in meliorative systems with the help of geoinformation software." E3S Web of Conferences 411 (2023): 02023. http://dx.doi.org/10.1051/e3sconf/202341102023.
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The article covers the issues of creation, optimization and rational use of a system that provides the current status, dynamics and changes of location indicators by conducting geodetic and topographic research using modern technologies of mapping based on geoinformation systems, as well as the problems of geodetic and topographic research.
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Pashkevich, V. V., and A. N. Vershkov. "New High-Precision Values of the Geodetic Rotation of the Mars Satellites System, Major Planets, Pluto, the Moon and the Sun." Artificial Satellites 54, no. 2 (June 1, 2019): 31–42. http://dx.doi.org/10.2478/arsa-2019-0004.
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Abstract In this study the relativistic effects (the geodetic precession and the geodetic nutation, which consist of the effect of the geodetic rotation) in the rotation of Mars satellites system for the first time were computed and the improved geodetic rotation of the Solar system bodies were investigated. The most essential terms of the geodetic rotation were computed by the algorithm of Pashkevich (2016), which is applicable to the study of any bodies of the Solar system that have long-time ephemeris. As a result, in the perturbing terms of the physical librations and Euler angles for Mars satellites (Phobos and Deimos) as well as in the perturbing terms of the physical librations for the Moon and Euler angles for major planets, Pluto and the Sun the most significant systematic and periodic terms of the geodetic rotation were calculated. In this research the additional periodic terms of the geodetic rotation for major planets, Pluto and the Moon were calculated.
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Kirilov, N. A. "The use of virtual reality technologies in the training of future specialists in the field of geodesy." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 27, no. 6 (2022): 28–38. http://dx.doi.org/10.33764/2411-1759-2022-27-6-28-38.
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Virtual reality allows getting more experience with geodetic instruments in various conditions in the future in addition to educational or vocational practices. The introduction of virtual reality technologies into the educational geodetic process requires the creation of appropriate software, and first the development of a test educational program for the focus group. The purpose of the study is to develop a methodology for creating a prototype of a geodetic simulator designed to train future specialists in the field of geodesy. The article analyzes and selects the software and hardware required for the development of a geodetic simulator. The stages of the developed methodology for creating a geodetic simulator are presented. In the course of the study, a prototype of a geodetic simulator was created, designed to train future specialists in the field of geodesy. The conclusion is made about the expediency of using virtual reality technologies in geodetic education and the prospects for further research in this area.
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Turekhanova, V., S. Saliy, M. Kudaibergenov, Y. Zhalgasbekov, and G. Jangulova. "Application of the wavelet transformation theory in the algorithm for constructing a quasigeoid model." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 4 (August 30, 2022): 123–29. http://dx.doi.org/10.33271/nvngu/2022-4/123.
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Purpose. To investigate the interaction of geodesic and normal altitude indicators according to quasigeoid data, the joint use of space measurements and those performed on the Earths surface in the implementation of geodetic tasks. In this article, the task is to create a calculation algorithm for further research on the quasigeoid model and the application of the model in solving geodetic problems. Methodology. Reliable determination of the height anomaly requires great accuracy, therefore, the theory of wavelet-transformation was used in the model of the variant of space technologies as an alternative to the laborious leveling of the Earths surface, which characterizes the actual fluctuations from the normal of the Earths gravitational field, when calculating the mean square deviations of the plumb line is an urgent task. Findings. A block diagram of the calculation algorithm has been compiled using a software package to solve the boundary problem of physical geodesy, in which the Earths surface is subject to modern space measurements. Originality. The use of wavelet analysis for processing information from satellite data in geodesy improves the results of image classification, and the coefficients of the wavelet transformation can be used as indicators for recognizing the coordinates of points with high accuracy. Practical value. Application of the theory of wavelet transformations as a powerful mathematical tool for solving problems of geodetic information, data compression and recovery, increasing computing performance, encoding information.
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Pashkevich, Vladimir V., and Andrey N. Vershkov. "Relativistic Effects in the Rotation of Jupiter’s Inner Satellites." Artificial Satellites 55, no. 3 (September 1, 2020): 118–29. http://dx.doi.org/10.2478/arsa-2020-0009.
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AbstractThe most significant relativistic effects (the geodetic precession and the geodetic nutation, which consist of the effect of the geodetic rotation) in the rotation of Jupiter’s inner satellites were investigated in this research. The calculations of the most essential secular and periodic terms of the geodetic rotation were carried out by the method for studying any bodies of the solar system with long-time ephemeris. As a result, for these Jupiter’s satellites, these terms of their geodetic rotation were first determined in the rotational elements with respect to the International Celestial Reference Frame (ICRF) equator and the equinox of the J2000.0 and in the Euler angles relative to their proper coordinate systems. The study shows that in the solar system there are objects with significant geodetic rotation, due primarily to their proximity to the central body, and not to its mass.
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Kirilov, N. A. "Development of a geodetic simulator in virtual reality mode." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 28, no. 2 (2023): 16–25. http://dx.doi.org/10.33764/2411-1759-2023-28-2-16-25.
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The introduction of virtual reality technologies in the educational process in addition to educational and industrial practices will allow а student to gain more experience with geodetic instruments under different conditions. The aim of the research is to develop a geodetic simulator, which can facilitate the experience of future specialists and improve the quality of the educational process. The article presents the development of the main menu of the simulator, the creation of a demo room of geodetic instruments, as well as testing of the developed software product. The result of the research is the creation of a fully functioning simulator of work with geodetic equipment in virtual reality, which allows supplementing both the distance learning process of future geodesists and the full-time educational process. Being a universal tool, the simulator will be useful not only for training future specialists, but also will help specialists with work experience to refresh their knowledge and practice with geodetic equipment at different locations.
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Braslavska, Oksana, Tetiana Dets, and Tomas Rozhi. "THE ROLE OF GEODESY IN THE DEVELOPMENT OF DRONE TECHNOLOGIES FOR MEASURING, MAPPING AND MONITORING TERRITORIES." Spatial development, no. 5 (November 24, 2023): 268–85. http://dx.doi.org/10.32347/2786-7269.2023.5.268-285.
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This study examines the relevance and importance of integrating geodetic methods into remote sensing technology from drones. The main focus is on exploring the possibilities of drones as an innovative tool that opens up new perspectives for measuring, mapping and monitoring territories. Advanced geodetic technologies and their applications in drone work are analyzed, including photogrammetry, laser scanning, and other data collection methods. The purpose of the article. Defining and systematizing the role of geodesy in the advancement of drone technologies used for precise measurements, mapping and monitoring of territories. Research task: to analyze the current state of geodetic methods in the context of their application in drone technologies; explore the possibilities of using unmanned aerial vehicles for geodetic work. Develop recommendations for the integration of drone technologies into geodetic practice. Research methods: analytical method - a systematic analysis of scientific publications, articles and reports that highlight current issues of geodesy and drone technologies, their development and application; empirical method - data collection and processing using drones, measurement, monitoring and mapping to assess the accuracy and effectiveness of these technologies; experimental method - conducting field tests of drone technologies to collect primary data, analyze them and compare them with traditional geodetic methods. An important part of the research is the evaluation of the effectiveness of the use of drones in comparison with traditional methods, with a special emphasis on increasing the accuracy, speed and reducing the cost of surveying work. The influence of legal aspects on the use of drones in geodesy is also considered, including the possibility of its adaptation to modern geodetic needs.
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Sztubecki, Jacek, Szymon Topoliński, Maria Mrówczyńska, Baki Bağrıaçık, and Ahmet Beycioğlu. "Experimental Research of the Structure Condition Using Geodetic Methods and Crackmeter." Applied Sciences 12, no. 13 (July 3, 2022): 6754. http://dx.doi.org/10.3390/app12136754.
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The article presents an approach to monitoring the structure’s condition with two measurement methods: the SHM-X crackmeter and the classic geodetic method of determining displacements, supplemented with additional information on the condition of the external environment obtained from thermal images. The study aimed to propose an approach combining geodetic and non-geodetic methods of assessing the condition of a structure and its effectiveness in practical application. The research facility is a public utility building of the Bydgoszcz University of Technology with a reinforced concrete structure. Objects of this type require periodic tests of their constancy. Interpreting the test results and identifying possible dangerous states that may indicate the risk of a construction failure is extremely important. The results presented in the article are an extension of the previous ones, in which several factors that could have a destructive effect on the structure were excluded. Observation of the object showed that only the reinforced construction plate is deformed. The only factor influencing the change in structure geometry is thermal changes. As part of the tests in places where cracks were noticed, the SHM-X crackmeter was used to measure the cracks’ opening. In the geodetic research, measurements of the measurement and control network displacement were carried out, in which the TDRA6000 laser station measurement technology was used. The control points were also placed in places where the width of the cracks was directly observed. The proposed approach, with the applied calculation scheme and supplementing the information with the temperature measurement with thermal images, showed the submillimeter accuracy of the determined 3D displacements of the controlled points. Additionally, the parallel application of these methods gives a complete picture of changes in the structure elements, in which signs of destruction appear under the influence of stress.
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Shanurov, G. A., and A. D. Manilova. "Mobile scanning complex positioning accuracy depending on the coordinate systems used." Geodesy and Cartography 919, no. 1 (February 20, 2017): 13–17. http://dx.doi.org/10.22389/0016-7126-2017-919-1-13-17.
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Inertial coordinate system and geodetic (terrestrial) coordinate system are used in processing of results of topographic survey, carried out with a mobile scanning complex. Mobile scanning complex geodetic coordinates, in turn, are presented in geodetic three-dimensional rectangular coordinate system form, in geodetic ellipsoidal coordinate system form and in the form of coordinates on a geodetic projection plane. The results of research, carried out earlier [4–7], suggest that the coordinate transformation on large areas distorts geodetic points coordinates. The article presents the results of similar investigations, but applied to a local area, limited by a mobile scanning complex surveying area. The accuracy of the mobile scanning complex coordinates is characterized by the mobile scanning complex coordinates errors cofactor matrix. It turned out that the local site sequential coordinate transformation procedure from one coordinate system to another coordinate system does not introduce any distortion into the mobile scanning complex coordinates.
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Mikhno, P. B., I. M. Shelkovska, V. I. Kozar, O. M. Kliuka, and Yu Ye Trehub. "Justification of geodetic monitoring methodology of the retaining walls on the example of the embankment in Kremenchuk." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 1 (February 29, 2024): 76–83. http://dx.doi.org/10.33271/nvngu/2024-1/076.
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Purpose. Development of a methodology for analyzing the results of geodetic measurements according to which it is possible to use the materials of past years for the needs of geodetic monitoring on the example of a retaining wall in the conditions of the city’s recreational area. Methodology. A technological scheme of geodetic monitoring of retaining walls has been developed with four main stages: analysis of initial data, design of geodetic monitoring, periodic observations, processing and analysis of geodetic monitoring results. The conditions of the recreational areas of the city determine the specifics of geodetic monitoring, limit the possibilities of choosing a scheme of the geodetic network and methods of measurements. In this regard, it is proposed to develop models of the development of deformation processes already at the first stage of geodetic monitoring, which will allow geodetic monitoring to be carried out with greater reliability in the future and avoid possible forecasting errors. Findings. The results of the analysis of geodetic measurements in the geodetic networks of Kremenchuk (coordinates and heights of wall signs) show the presence of horizontal and vertical displacements of the retaining wall. In the horizontal plane the retaining wall has shifted in the south-western direction, towards the Dnipro River. In the vertical plane, the retaining wall has subsided. The displacements of different parts of the retaining wall are uneven. The average annual rate of both horizontal and vertical displacements is equivalent and is approximately 1 mm/year. The values of absolute displacement vectors of wall signs in the horizontal plane exceed the accuracy of geodetic measurements and normative tolerances. Originality. Modeling of displacements of retaining walls in the conditions of recreational areas of the city is already underway, taking into account the analysis of the results of geodetic measurements of past years. Practical value. The data of the analysis of the results of geodetic measurements carried out in the geodetic densification networks of Kremenchuk indicate the presence of deformation processes and justify the need for their control through geodetic monitoring. The suggested models can be used as the comparative and combined analysis of future forecast changes based on previous and current results of measurements, which is a topic for another research.
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Eroshkin, G., and V. Pashkevich. "On the Geodetic Rotation of the Major Planets, the Moon and the Sun." Artificial Satellites 44, no. 2 (January 1, 2009): 43–52. http://dx.doi.org/10.2478/v10018-009-0018-3.
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On the Geodetic Rotation of the Major Planets, the Moon and the SunThe problem of the geodetic (relativistic) rotation of the major planets, the Moon and the Sun was studied in the paper by Eroshkin and Pashkevich (2007) only for the components of the angular velocity vectors of the geodetic rotation, which are orthogonal to the plane of the fixed ecliptic J2000. This research represents an extension of the previous investigation to all the other components of the angular velocity vector of the geodetic rotation, with respect to the body-centric reference frame from Seidelmann et al. (2005).
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Nowak, Edward, Ryszard Malarski, Witold Prószyński, Alicja Sadowska, Marek Woźniak, and Janina Zaczek-Peplinska. "Research and Development Work Carried out by the Chair of Engineering Geodesy and Measurement and Control Systems, Faculty of Geodesy and Cartography WUT – Thematic Scope and Achievements." Reports on Geodesy and Geoinformatics 100, no. 1 (June 1, 2016): 201–19. http://dx.doi.org/10.1515/rgg-2016-0014.
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Abstract Geodetic engineering surveys are an important part of the works carried out by the Faculty of Geodesy and Cartography, Warsaw University of Technology. These works concern measurement techniques as well as advanced result analysis methods applied in precise industrial surveys and in processes controlling object’s behaviour over time. The thematic scope of research realised by Chair of Engineering Geodesy and Control-Measuring Systems shows that article related to geodetic engineering measurements and geodetic monitoring is carried out with high intensity, resulting in technological advancement and implementation of new or improved measurement solutions and methods of measurement result development.
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Kukhar, Maksym, Maria Myronenko, Sergiy Kobzan, and Lubov Masliy. "ANALYSIS OF THE MAIN ASPECTS OF MODERN TOOLS FOR SOLVING GEODETIC PROBLEMS." Sworld-Us Conference proceedings, usc16-01 (January 30, 2019): 37–42. http://dx.doi.org/10.30888/2709-2267.2023-16-01-043.
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The article analyzes the capabilities of modern tools for solving geodetic problems.The research uses the following methods: observation, comparison, analysis, sampling.Currently, geodetic equipment is entering a new level of development: in terms of me
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Bielecka, Elzbieta, Krzysztof Pokonieczny, and Sylwia Borkowska. "GIScience Theory Based Assessment of Spatial Disparity of Geodetic Control Points Location." ISPRS International Journal of Geo-Information 9, no. 3 (March 3, 2020): 148. http://dx.doi.org/10.3390/ijgi9030148.
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Geodetic networks provide a spatial reference framework for the positioning of any geographical feature in a common and consistent way. An even spatial distribution of geodetic control points assures good quality for subordinate surveys in mapping, cadaster, engineering activities, and many other land administration-oriented applications. We investigate the spatial pattern of geodetic control points based on GIScience theory, especially Tobler’s Laws in Geography. The study makes contributions in both the research and application fields. By utilizing Average Nearest Neighbor, multi-distance spatial cluster analysis, and cluster and outlier analysis, it introduces the comprehensive methodology for ex post analysis of geodetic control points’ spatial patterns as well as the quantification of geodetic networks’ uniformity to regularly dense and regularly thinned. Moreover, it serves as a methodological resource and reference for the Head Office of Geodesy and Cartography, not only the maintenance, but also the further densification or modernization the geodetic network in Poland. Furthermore, the results give surveyors the ability to quickly assess the availability of geodetic points, as well as identify environmental obstacles that may hamper measurements. The results show that the base geodetic control points are evenly dispersed (one point over 50 sq. km), however they tend to cluster slightly in urbanized areas and forests (1.3 and 1.4 points per sq. km, respectively).
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Pacina, Jan. "Geodetic surveying as part of archaeological research in Sudan." Geoinformatics FCE CTU 14, no. 1 (June 27, 2015): 47–64. http://dx.doi.org/10.14311/gi.14.1.4.
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<p>Surveying is an important part of any archaeological research. In this paper we focus on the archaeological research in north Sudan (6<sup>th</sup> Nile cataract) and the surveying methods applicable under the local conditions. Surveying in the Third World countries is affected by the political situation (limited import of surveying tools), local conditions (lack of fixed points, GNSS correction signal), inaccessible basemaps and fixed point network. This article describes the methods and results obtained during the three archaeological seasons (2011-2014). The classical surveying methods were combined with KAP (Kite Aerial Photography) to obtain the desired results in form of archaeological maps, detailed orthophoto images and other analyses results.</p>
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Featherstone, W. E., M. P. Stewart, C. Rizos, S. Han, R. Coleman, P. Tregoning, and P. J. Morgan. "A new facility to enhance Australian GPS-geodetic research." Australian Surveyor 45, no. 1 (June 2000): 20–30. http://dx.doi.org/10.1080/00050353.2000.10558800.
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KIN, D. "On improving the accuracy of analytical and numerical methods ofgeodesic and cartometric operations." Modern achievements of geodesic science and industry 1, no. 47 (April 1, 2024): 149–60. http://dx.doi.org/10.33841/1819-1339-1-47-149-160.
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Purpose of this work is to determine and justify the use of analytical and numerical geodetic and cartometric methods on the reference ellipsoid, as well as their calculation accuracy in the geographic information environment. Methodology. The research compiled a register of geodetic and cartometric methods used in geodetic practice and implemented in modern geographic information systems. Standard tools in GIS often use approximate numerical methods, which affects the accuracy of models of geospatial objects in the GIS environment. Therefore, we have analysed and established for each operation of geodetic and cartometric methods a mathematical model that determines a particular cartometric property with maximum accuracy either by analytical or numerical methods with the number of terms in the binomial series of 6 or more. Results. The author proposed 10 operations of the geodetic method and 3 operations of the cartometric method, for which mathematical models and their accuracy were established and substantiated with their corresponding implementation in the MATLAB v. R2018a. The defined list of geodetic and cartometric operations made it possible to move away from the classification of distance lengths that influenced the further use of certain surfaces (map projection plane, sphere, spheroid, or reference ellipsoid) and mathematical models of operations. The presented mathematical models allow performing the relevant geodetic and cartometric methods with maximum accuracy using modern computer technologies. The mathematical models of geodetic and cartometric methods are investigated, which have practically no limitations for achieving the required accuracy, especially for large and ultra-large distances. The scientific novelty of the research is to define and justify a clear list of mathematical models of numerical and analytical geodetic and cartometric methods instead of cartometric methods on the map and standard methods of instrumental GIS; using the surface of the reference ellipsoid, and not just cartographic projections, spheroid or sphere. The practical significance of the research lies in the use of numerical and analytical geodetic and cartometric methods that significantly increase the accuracy of operations in these works, as well as in the creation/updating of digital topographic maps, navigation and route planning, etc. The research results can be concluded that well-founded mathematical models will ensure an increase in the accuracy of computational operations taking into account the curvature of the Earth in all sectors and areas of the economy, which will affect the quality of accounting and monitoring of relevant objects, integration and geospatial analysis of heterogeneous geospatial data, improve the quality (topological consistency) of geospatial data, etc
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Goraj, Zdobyslaw Jan, Mariusz Kowalski, and Bartlomiej Goliszek. "Stress, strain and displacement analysis of geodetic and conventional fuselage structure for future passenger aircraft." Aircraft Engineering and Aerospace Technology 91, no. 6 (June 10, 2019): 814–19. http://dx.doi.org/10.1108/aeat-07-2018-0216.
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Purpose This paper aims to present the results of calculations that checked how the longerons and frames arrangement affects the stiffness of a conventional structure. The paper focuses only on first stage of research – analysis of small displacement. Main goal was to compare different structures under static loads. These results are also compared with the results obtained for a geodetic structure fuselage model of the same dimensions subjected to the same internal and external loads. Design/methodology/approach The finite element method analysis was carried out for a section of the fuselage with a diameter of 6.3 m and a length equal to 10 m. A conventional and lattice structure – known as geodetic – was used. Findings Finite element analyses of the fuselage model with conventional and geodetic structures showed that with comparable stiffness, the weight of the geodetic fuselage is almost 20 per cent lower than that of the conventional one. Research limitations/implications This analysis is limited to small displacements, as the linear version of finite element method was used. Research and articles planned for the future will focus on nonlinear finite element method (FEM) analysis such as buckling, structure stability and limit cycles. Practical implications The increasing maturity of composite structures manufacturing technology offers great opportunities for aircraft designers. The use of carbon fibers with advanced resin systems and application of the geodetic fuselage concept gives the opportunity to obtain advanced structures with excellent mechanical properties and low weight. Originality/value This paper presents very efficient method of assessing and comparison of the stiffness and weight of geodetic and conventional fuselage structure. Geodetic fuselage design in combination with advanced composite materials yields an additional fuselage weight reduction of approximately 10 per cent. The additional weight reduction is achieved by reducing the number of rivets needed for joining the elements. A fuselage with a geodetic structure compared to the classic fuselage with the same outer diameter has a larger inner diameter, which gives a larger usable space in the cabin. The approach applied in this paper consisting in analyzing of main parameters of geodetic structure (hoop ribs, helical ribs and angle between the helical ribs) on fuselage stiffness and weight is original.
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Pashkevich, Vladimir V., and Andrey N. Vershkov. "Relativistic Effects in the Rotation of Dwarf Planets and Asteroids." Artificial Satellites 57, no. 3 (September 1, 2022): 158–84. http://dx.doi.org/10.2478/arsa-2022-0008.
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Abstract The effect of the geodetic rotation (which includes two relativistic effects: geodetic precession and geodetic nutation) is the most significant relativistic effect in the rotation of the celestial bodies. For the first time in this research, this relativistic effect is determined in the rotation of dwarf planets (Ceres, Pluto, and Charon) and asteroids (Pallas, Vesta, Lutetia, Europa, Ida, Eros, Davida, Gaspra, Steins, and Itokawa) in the Solar System with known values of their rotation parameters. Calculations of the values of their geodetic rotation are made by a method for studying any bodies in the Solar System with a long-term ephemeris. Values of geodetic precession and geodetic nutation for all these celestial bodies were calculated in ecliptic Euler angles relative to their proper coordinate systems and in their rotational elements relative to the fixed equator of the Earth and the vernal equinox (at the epoch J2000.0). The obtained analytical values of the geodetic rotation for the celestial bodies can be used to numerically investigate their rotation in the relativistic approximation, and also used to estimate the influence of relativistic effects on the orbital–rotational dynamics for the bodies of exoplanetary systems.
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Celms, Armands, Ilona Reke, Miks Brinkmanis-Brimanis, and Vivita Pukite. "Evaluation of the Local Geodetic Network in Jurmala City." Baltic Surveying 10 (June 1, 2019): 8–15. http://dx.doi.org/10.22616/j.balticsurveying.2019.001.
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In order to evaluate the accuracy of the local geodetic network of Jurmala City, in research, comparison of forty-seven selected polygonometry network point coordinates with the obtained data was made by performing measurements by real time cinematic (RTK) method in LatPos base station system. Points were chosen so in order to cover evenly the entire territory of the city. At present, gradual renewal and improvement of the local geodetic network takes place in Jurmala. The linear discrepancy of coordinates obtained in measurements varies from 0.016 m to 0.259 m, mean linear discrepancy in the measured points is fixed 0.110 m. Discrepancy of plane coordinates in different regions of Jurmala is not even. It is rather even within approximate boundaries of the determined regions, this is indicated by different directions of offset vectors, which in eastern part of the city are pointed mainly in NW direction, in central part directions are pointed in W direction, but in the western part of the city pointed in NE direction. Concerning heights, only for 3 of measured points discrepancy exceeds 0.05 m error and there are no connection concerning some specific region. 15% of the measured points of the local geodetic network are with appropriate accuracy of plane coordinates. The linear discrepancy of plane coordinates for points of the local geodetic network, which are measured by RTK method and compared with data from the improved network is 0.024 (m), which indicates the high accuracy of RTK method in measurement data. In Jurmala City, obtaining of data by GNNS data receivers is encumbered by large density of trees. Therefore the local geodetic network in city has very important role in order to ensure performance of geodetic measurements of high quality in the territory of the city. Aim of the research is to evaluate the accuracy of the local geodetic network of Jurmala City. The following tasks have been set for achieving the aim: research of the given problem, visit of the local geodetic network points, performing control measurements, data processing and analysis.
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Gong, Yu Sheng, Qian Han, and Li Ping Zhang. "Research into the Model of GNSS Leveling Polynomial Surface Fitting Based on MATLAB." Applied Mechanics and Materials 90-93 (September 2011): 2907–12. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.2907.
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To make full use of geodetic height results measured by GNSS and improve the accuracy that GNSS geodetic height convert to normal height, method of polynomial surface fitting has been selected in this article to research into fitting of the elevation. In the first place, for least squares estimation do not have the ability of resisting gross error, robust estimation is introduced to data preprocessing, which has solve the problem of distortion model effectively and then combines with specific engineering to make comparison and to analyze accuracy of polynomial surface fitting data of different orders. MATLAB has been used in programming design in the whole process, which has realized automatic processing of data.
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Xie, Rui, and Xiao Qiang Liu. "Design and Research of Coalfield Geodetic Survey Control Point Result Information Management System Based on GIS." Applied Mechanics and Materials 170-173 (May 2012): 2811–14. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.2811.
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Coalfield control survey results are work foundation of coalfield construction and whole engineering surveying and initial data of coalfield-exploration surveying and mapping. Digital information management system is an inevitable trend to coalfield control-survey data digital management. The paper introduced the design of information management system of control point results in coalfield geodetic survey based on GIS. It contained the system architecture, function module, safety management module and others. The realization of the system can make standardized management, information processing and sharing, and security of coalfield geodetic survey results effective improvement. It has an important meaning and strong practical value.
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Sjöberg, L. E. "Arne Bjerhammar- a personal summary of his academic deeds." Journal of Geodetic Science 11, no. 1 (January 1, 2021): 1–6. http://dx.doi.org/10.1515/jogs-2020-0117.
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Abstract Arne Bjerhammar is well known worldwide mainly for his research in physical geodesy but also for introducing a new matrix algebra with generalized inverses applied in geodetic adjustment. Less known are his developments in geodetic engineering and contributions to satellite and relativistic geodesy as well as studies on the relation between the Fennoscandia land uplift and the regional gravity low. Most likely part of his research has contributed to worldwide political relaxation during the cold war, which deed was honored by a certificate of achievement awarded by the Department of Research of the US army as well as the North Star Order by the King of Sweden. Arne Bjerhammar’s pioneer scientific production, in particular on a world geodetic system, towards what would become GPS, as well as relativistic geodesy, is still of great interest among the worldwide geodetic community, while the memories and spirit along his outstanding academic deeds have more or less fainted away from his home university (KTH) only a decade after he passed away.
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Kin, Danylo, and Yurii Karpinskyi. "GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY." GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY 95,2022, no. 95 (June 28, 2022): 103–12. http://dx.doi.org/10.23939/istcgcap2022.95.103.
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The aim of this work – research of topological inconsistencies during adjustment and junction of adjacent map sheets of digital topographic maps of scale 1:50000 with the use of rigorous analytical geodetic methods on the reference ellipsoid in the geoinformation environment. The research analyzes the phenomenon of topological inconsistencies of frames of adjacent digital topographic maps of 1:50000 scale within the zones of Gauss-Krueger projections and the feasibility of transition to rigorous analytical geodetic methods in the geoinformation environment during the creation of the topographic database “The Main state topographic map” by determining the differences between the vertices of the frames of digital topographic maps at a scale of 1: 50000 at the boundaries of the projection zones. This phenomenon was discovered during work at the state enterprise “Research Institute of Geodesy and Cartography”. The dependences are shown and analyzed, which show the changes in the distances between the vertices of the frames of adjacent map sheets of scale 1: 50000 in longitude and latitude. These values range from 1 mm to 8 mm, which leads to topological inconsistencies in the form of gaps and overlaps of adjacent map sheets. These gaps and overlaps complicate the process of adjustment of map sheets and make it impossible to automate the process of the junction of features into the topographic database. The scientific novelty of the research is to justify the use of rigorous analytical geodetic methods and tools instead of analog cartometric and standard methods of instrumental GIS; the use of a reference ellipsoid, not just cartographic projections, a spheroid or a sphere. The practical significance of research is the use of rigorous analytical geodetic methods that significantly minimize the values of gaps and overlaps, as the establishment of tolerances for these values does not automate the process of correct adjustment and junction of map sheets. The performed research can be used to create the topographic database “The Basic topographic map scale 1: 10000”, during the creation and updating of geospatial data in the geoinformation environment and the implementation of geodetic methods to determine the cartometric characteristics of features using GIS. Given the results of research, we can conclude that the present stage of application of geographic information systems in topographic and geodetic activities requires increasing the level of data topology and accuracy of all cartometric methods, which leads to the transition to extremely rigorous analytical geodetic methods directly on the reference ellipsoid.
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Julianto, Eko Nugroho, Ispen Safrel, and Arie Taveriyanto. "High Accuracy Geodetic Control Point Measurement Using GPS Geodetic With Static Methods." Jurnal Teknik Sipil dan Perencanaan 20, no. 2 (November 29, 2018): 81–89. http://dx.doi.org/10.15294/jtsp.v20i2.16300.
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Abstract. The quality of the coordinates of the points in a generally horizontal control network will be influenced by many factors, such as the system equipment used for measuring / observation, the network geometry, measurement strategies / observation, as well as data processing strategy implemented. Using development of the GPS satellite system, since 1989, the network provision of horizontal control points in Indonesia generally relies on the GPS satellite observations. One way of measuring geodetic control points with high accuracy is using geodetic GPS. Measurement of geodetic control points required as a control in the execution of the work and as a correction coordinate measurement of the position of a measurement object with a high degree of accuracy (± 1 cm). How many measurement methods that can be done. This research conducted measurement using static method. Static surveys are used to determine the coordinates of the control points are relatively distant from each other as well as order accuracy requires relatively higher. The measurement results obtained coordinate data for point 1 is 6 ° 57 '31.92207 "LS; 109 ° 38 '32.25194 "BT; high (ellipsoid) 34 320 m and point 2 is 6 ° 57 '33.59086 "LS; 109 ° 38 '37.87710 "BT; high (ellipsoid) 36 235 m.
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Thevoho, I., B. CHETVERIKOV, and M. TRYUKHAN. "Innovative technologies at INTERGEO 2022." Modern achievements of geodesic science and industry 1, no. 45 (April 1, 2023): 22–31. http://dx.doi.org/10.33841/1819-1339-1-45-22-31.
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The given information about new developments, geodetic and photogrammetric devices, systems and complexes, the latest technologies and areas of professional research presented at the world geodetic congress INTERGEO 2022 in Essen (Germany) and the results of participation in its work by scientists and specialists from Ukraine
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Nikonov, Anton, and Irina Chesheva. "ACCURACY OF THE GEODETIC CONTROL NETWORK DEVELOPED BY LAND METHODS." Interexpo GEO-Siberia 1, no. 1 (2019): 130–43. http://dx.doi.org/10.33764/2618-981x-2019-1-1-130-143.
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The article gives comparative analysis of the creating horizontal and vertical geodetic control network for the purposes of research and building. It is recommended to create geodetic network on the territory up to 1–2 sq km by means of linear-angular measurements with the accuracy of urban fourth-order traverse. After centering the total station and the reflector with an error not more than 1 mm, the minimal network side is 140 m. The precalculation of geodetic control network accuracy with the given confidence level can be performed in CredoDAT. Creation of vertical and horizontal geodetic network should go simultaneously – by means of reciprocal trigonometric leveling of III–IV order accuracy. The height of the total station with use of specific tape measurer Leica can be measured with error of up to 1 mm. The requirements of the acting set of rules «Geodetic works in construction» are not always substantiated and require careful attitude.
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Uspeneva, Marina G., and Andrej M. Astapov. "APPLICATION OF MODERN TECHNOLOGIES OF ENGINEERING AND GEODESIC WORKS FOR SURVEYING OF MAIN GAS PIPELINES." Interexpo GEO-Siberia 1, no. 1 (July 8, 2020): 50–63. http://dx.doi.org/10.33764/2618-981x-2020-1-1-50-63.
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During the construction of oil and gas pipelines, a complex of engineering and geodetic works is necessary to ensure the geometric parameters of the designed routes during their laying. Therefore, the development of new methods for performing engineering and geodetic works for tracing linear structures using modern instruments is an urgent task. The purpose of this research is to analyze the modern methodology for the implementation of engineering and geodetic works for surveying and construction of the gas pipeline. The object of surveying is the route of the main gas pipeline «Aikhal-Udachny». The approbation of the methodology for performing engineering and geodetic works surveying for the «Aikhal-Udachny» gas pipeline was carried out and an analysis of the results was given.
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Tsvetkov, V. Ya, and V. V. Oznamets. "Big data in geodetic software." Geodesy and Cartography 988, no. 10 (November 20, 2022): 9–19. http://dx.doi.org/10.22389/0016-7126-2022-988-10-9-19.
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The authors explore the problem of big data in the view of Earth sciences and spatial information. It is noted that the matter has existed since the beginning of space research. The conclusion is that this problem is subtle and is related to the level of developing computer technology and computational models. We analyze the issues of big data occurrence and its reasons. As one of the methods for working with such volumes, cloud computing is proposed. It is proved that spatial data make up the bulk of them. It is shown that streaming information processing methods give way to this technology. The impact of big data on surveying support is researched. The conclusion is made that modern geodetic support can be considered as applied and fundamental. Applied geodetic support is aimed at solving the corresponding problems and is connected with technological supplement. For it the big data issue is important, but not as significant as for fundamental geodetic support. In that level of research it is defined as an integrated set of technologies for which the mentioned matter is relevant. Fundamental geodetic support includes measurements, comprehensive analysis and calculations and is closely related to processing and analysis of big data. As a promising way for it, quantum computing is proposed.