Relevant bibliographies by topics / Geodetic networks

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Geodetic networks'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Geodetic networks"

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Ge, Huifen, Zhao Wang, and Jinyu Zou. "Strong Geodetic Number in Some Networks." Journal of Mathematics Research 11, no. 2 (February 20, 2019): 20. http://dx.doi.org/10.5539/jmr.v11n2p20.

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A vertex subset S of a graph is called a strong geodetic set if there exists a choice of exactly one geodesic for each pair of vertices of S in such a way that these (|S| 2) geodesics cover all the vertices of graph G. The strong geodetic number of G, denoted by sg(G), is the smallest cardinality of a strong geodetic set. In this paper, we give an upper bound of strong geodetic number of the Cartesian product graphs and study this parameter for some Cartesian product networks.
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Manuel, Paul, Sandi Klavžar, Antony Xavier, Andrew Arokiaraj, and Elizabeth Thomas. "Strong edge geodetic problem in networks." Open Mathematics 15, no. 1 (October 3, 2017): 1225–35. http://dx.doi.org/10.1515/math-2017-0101.

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Abstract Geodesic covering problems form a widely researched topic in graph theory. One such problem is geodetic problem introduced by Harary et al. [Math. Comput. Modelling, 1993, 17, 89-95]. Here we introduce a variation of the geodetic problem and call it strong edge geodetic problem. We illustrate how this problem is evolved from social transport networks. It is shown that the strong edge geodetic problem is NP-complete. We derive lower and upper bounds for the strong edge geodetic number and demonstrate that these bounds are sharp. We produce exact solutions for trees, block graphs, silicate networks and glued binary trees without randomization.
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Tretyak, Kornyliy, and Igor Savchyn. "Posteriori Optimization of Active Geodetic Monitoring Networks." Reports on Geodesy and Geoinformatics 96, no. 1 (June 1, 2014): 67–77. http://dx.doi.org/10.2478/rgg-2014-0007.

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Abstract This paper presents developed method of a posteriori optimization of measurement results of active geodesic monitoring networks with taking into account the parameters of accuracy and reliability. Filtering the measurement results of active geodetic monitoring networks is in out of order exclusion vectors with maximum corrections, which is determined from successive iterations of network adjustment. After each iteration it’s determined the mean square error of unit weight and the parameter of network reliability. Sifting vectors with maximal errors leads to accuracy improving and reliability deterioration of network. Using entropy approach is defined group of vectors in which the value of accuracy and reliability is optimal. Using the developed method performed a posteriori optimization of active precision geodesic monitoring network of the Dnieper, Dniester and Kanev HPP. The represented method can also be used for the optimization of any active geodesic monitoring networks with large quantity of redundant measurements
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Kadaj, Roman. "Empirical methods of reducing the observations in geodetic networks." Geodesy and Cartography 65, no. 1 (June 1, 2016): 13–40. http://dx.doi.org/10.1515/geocart-2016-0001.

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Abstract The paper presents empirical methodology of reducing various kinds of observations in geodetic network. A special case of reducing the observation concerns cartographic mapping. For numerical illustration and comparison of methods an application of the conformal Gauss-Krüger mapping was used. Empirical methods are an alternative to the classic differential and multi-stages methods. Numerical benefits concern in particular very long geodesics, created for example by GNSS vectors. In conventional methods the numerical errors of reduction values are significantly dependent on the length of the geodesic. The proposed empirical methods do not have this unfavorable characteristics. Reduction value is determined as a difference (or especially scaled difference) of the corresponding measures of geometric elements (distances, angles), wherein these measures are approximated independently in two spaces based on the known and corresponding approximate coordinates of the network points. Since in the iterative process of the network adjustment, coordinates of the points are systematically improved, approximated reductions also converge to certain optimal values.
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Goluk, Victor P., and Denis G. Nazarov. "FEATURES OF GEODECTIC NETWORKS DENSIFICATION ON THE EXAMPLE OF A RAILWAY BRIDGE CROSSING CONSTRUCTION ACROSS THE KERCHEN STRAIT." Interexpo GEO-Siberia 1, no. 1 (July 8, 2020): 93–105. http://dx.doi.org/10.33764/2618-981x-2020-1-1-93-105.

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The geodetic center base for the construction of bridge structures is the basis of all measurement work. Often it is necessary to carry out the densification of the geodetic center base in compliance with the necessary accuracy of recoverable structures. In the process of geodesic control of the construction of a railway bridge on Section No. 3 of the channel between Tuzlinsky Spit and Tuzla Island, difficulties arose in bringing the project to life at all stages of the construction of a structure associated with the low density of geodetic center base points located in the aquatic area. Based on the above the geodesic service of the LLC “Bridge Bureau” carried out work on the concentration of the geodetic center at the construction site of the bridge crossing (the working bridge RM-1 - site No. 3), as well as taking into account: Section 4 of the joint venture 126.13330.2017 "Geodetic works in construction", GOST 21780-2006 "System for ensuring the accuracy of geometrical parameters in construction. Calculation of accuracy ", as well as SP 46.13330.2012" Bridges and pipes." An a priori assessment of the accuracy of the measurement results for each of the methods for monitoring the planning and altitude position of the condensation points was made. A combined approach to densification of the geodetic center base is suggested.
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Grimm‐Pitzinger, A., and K. Hanke. "Restrictions in Geodetic Networks." Journal of Surveying Engineering 116, no. 3 (August 1990): 149–54. http://dx.doi.org/10.1061/(asce)0733-9453(1990)116:3(149).

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Murzincev, P. P., А. V. Polianskiy, and L. E. Serdakov. "On optimization of geodetic reference networks of accelerators using laser trackers." Geodesy and Cartography 923, no. 5 (June 20, 2017): 2–6. http://dx.doi.org/10.22389/0016-7126-2017-923-5-2-6.

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The features of laser tracker measurements and their accounting for designing geodetic networks on the accelerator complexes are considered. The key parameters for the optimization of the spatial geodetic network of the accelerator are proposed. The dependence of average mean square errors on the radial and altitudinal directions of orientation of the sighting beam for distances from 1 to 30 meters was defined. The influence of the choice of stations for mounting the laser tracker to determine the parameters of the ellipsoid of errors was studied. The measurements for three variants of geodetic networks in the tunnel with the adopted geometric parameters were simulated. The data of the deviations of the points of the network radius, altitude relative to the project was indicated. The obtained results can be useful both at the design stage of geodetic network accelerator, and at the stage of installation of technological equipment.
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Bonimani, Maria L. S., Vinicius Francisco Rofatto, Marcelo T. Matsuoka, and Ivandro Klein. "Aplicação de Números Aleatórios Artificiais e Método Monte Carlo na Análise de Confiabilidade de Redes Geodésicas." Revista Brasileira de Computação Aplicada 11, no. 2 (June 26, 2019): 74–85. http://dx.doi.org/10.5335/rbca.v11i2.8906.

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A Geodetic Network is a network of point interconnected by direction and/or distance measurements or by using Global Navigation Satellite System receivers. Such networks are essential for the most geodetic engineering projects, such as monitoring the position and deformation of man-made structures (bridges, dams, power plants, tunnels, ports, etc.), to monitor the crustal deformation of the Earth, to implement an urban and rural cadastre, and others. One of the most important criteria that a geodetic network must meet is reliability. In this context, the reliability concerns the network's ability to detect and identify outliers. Here, we apply the Monte Carlo Method (MMC) to investigate the reliability of a geodetic network. The key of the MMC is the random number generator. Results for simulated closed levelling network reveal that identifying an outlier is more difficult than detecting it. In general, considering the simulated network, the relationship between the outlier detection and identification depends on the level of significance of the outlier statistical test.
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Jaworski, Leszek, Anna Swiatek, Ryszard Zdunek, and Janusz Zielinski. "Integration of the ASG-EUPOS Permanent Stations with First Order National Geodetic Networks - Measurements and Results." Artificial Satellites 46, no. 4 (January 1, 2011): 165–74. http://dx.doi.org/10.2478/v10018-012-0008-8.

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Integration of the ASG-EUPOS Permanent Stations with First Order National Geodetic Networks - Measurements and ResultsThe ASG-EUPOS network - the active geodetic network was established in Poland in 2008. The 2010/2011 campaign was the second one managed to integrate the ASG-EUPOS network with the first order national geodetic networks in Poland. As the result the station coordinates were determined in the uniform coordinate frame. The paper describes the measurements carried out for data acquisition as well as the data processing method. The results present analyses of differences between selected variants of solutions and show some problems encountered during the calculation.
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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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Dissertations / Theses on the topic "Geodetic networks"

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Alizadeh, Khameneh Mohammad Amin. "On Optimisation and Design of Geodetic Networks." Licentiate thesis, KTH, Geodesi och satellitpositionering, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168314.

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Optimisation of a geodetic network is performed to provide its pre-set quality requirements. Today, this procedure is almost run with the aid of developed analytical approaches, where the human intervention in the process cycle is limited to defining the criteria. The existing complication of optimisation problem was terminated by classifying it into several stages. By performing these steps, we aim to design a network with the best datum, configuration and the observation weights, which meets the precision, reliability and cost criteria. In this thesis, which is a compilation of four papers in scientific journals, we investigate the optimisation problem by developing some new methods in simulated and real applications. On the first attempt, the impact of different constraints in using a bi-objective optimisation model is investigated in a simulated network. It is particularly prevalent among surveyors to encounter inconsistencies between the controlling constraints, such as precision, reliability and cost. To overcome this issue in optimisation, one can develop bi-objective or multi-objective models, where more criteria are considered in the object function. We found out that despite restricting the bi-objective model with precision and reliability constraints in this study, there is no significant difference in results compared to the unconstrained model. Nevertheless, the constrained models have strict controls on the precision of net points and observation reliabilities. The importance of optimisation techniques in optimal design of displacement monitoring networks leads to the development of a new idea, where all the observations of two epochs are considered in the optimisation procedure. Traditionally, an observation plan is designed for a displacement network and repeated for the second epoch. In the alternative method, by using the Gauss-Helmert method, the variances of all observations are estimated instead of their weights to perform the optimisation. This method delivers two observation plans for the two epochs and provides the same displacement precision as the former approach, while it totally removes more observations from the plan. To optimise a displacement monitoring network by considering a sensitivity criterion as a main factor in defining the capacity of a network in detecting displacements, a real case study is chosen. A GPS displacement monitoring network is established in the Lilla Edet municipality in the southwest of Sweden to investigate possible landslides. We optimised the existing monitoring network by considering all quality criteria, i.e. precision, reliability and cost to enable the network for detecting 5 mm displacement at the net points. The different optimisation models are performed on the network by assuming single baseline observations in each measurement session. A decrease of 17% in the number of observed baselines is yielded by the multi-objective model. The observation plan with fewer baselines saves cost, time and effort on the project, while it provides the demanded quality requirements. The Lilla Edet monitoring network is also used to investigate the idea, where we assume more precise instruments in the second of two sequential epochs. In this study, we use a single-objective model of precision, and constrained it to reliability. The precision criterion is defined such that it provides the sensitivity of the network in detecting displacements and has a better variance-covariance matrix than at the first epoch. As the observations are GPS baselines, we assumed longer observation time in the second epoch to obtain higher precision. The results show that improving the observation precision in the second epoch yields an observation plan with less number of baselines in that epoch. In other words, separate observation plans with different configurations are designed for the monitoring network, considering better observation precision for the latter epoch.

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Curtis, Deborah Jane. "Ocean tide loading for geodetic applications." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319963.

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Rens, Jan. "Combination of three dimensional geodetic networks using similarity transformations." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/17176.

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Bibliography: pages 173-178.
Classical terrestrial (horizontal and vertical) networks and Doppler satellite derived networks are combined in a three dimensional transformation adjustment by solving for the external bias parameters using any of the three standard seven parameter similarity transformation models, namely the Bursa, Molodensky and Veis models. The object of this combination may be merely to merge the systems or networks, but may additionally involve an attempt to assign physical meaning to the estimated bias parameters. These two aspects, and the influence of the a priori Variance-Covariance matrix of the observables on the parameters and their interpretation is studied in detail. An in-depth conceptual, mathematical and numerical comparative assessment of the three standard models is made. The homogeneity of the classical terrestrial South African networks is investigated by comparing the transformation parameter sets derived for different regions and sub-regions of the country.
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Rayson, Martin W. "Computer aided design of geodetic networks for monitoring crustal tectonics." Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278767.

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Turney, J. F. "Simultaneous adjustment of space and terrestrial observations in large geodetic networks." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381099.

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Klein, Ivandro. "Controle de qualidade no ajustamento de observações geodésicas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/38615.

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Após o ajustamento de observações pelo método dos mínimos quadrados (MMQ) ter sido realizado, é possível a detecção e a identificação de erros não aleatórios nas observações, por meio de testes estatísticos. A teoria da confiabilidade faz uso de medidas adequadas para quantificar o menor erro detectável em uma observação, e a sua influência sobre os parâmetros ajustados, quando não detectado. A teoria de confiabilidade convencional foi desenvolvida para os procedimentos de teste convencionais, como o data snooping, que pressupõem que apenas uma observação está contaminada por erros grosseiros por vez. Recentemente foram desenvolvidas medidas de confiabilidade generalizadas, relativas a testes estatísticos que pressupõem a existência, simultânea, de múltiplas observações com erros (outliers). Outras abordagens para o controle de qualidade do ajustamento, alternativas a estes testes estatísticos, também foram propostas recentemente, como por exemplo, o método QUAD (Quasi-Accurate Detection of outliers method). Esta pesquisa tem por objetivo fazer um estudo sobre o controle de qualidade do ajustamento de observações geodésicas, por meio de experimentos em uma rede GPS (Global Positioning System), utilizando tanto os métodos convencionais quanto o atual estado da arte. Desta forma, foram feitos estudos comparativos entre medidas de confiabilidade convencionais e medidas de confiabilidade generalizadas para dois outliers simultâneos, bem como estudos comparativos entre o procedimento data snooping e testes estatísticos para a identificação de múltiplos outliers. Também se investigou como a questão das variâncias e covariâncias das observações, bem como a geometria/configuração da rede GPS em estudo, podem influenciar nas medidas de confiabilidade, tanto na abordagem convencional, quanto na abordagem generalizada. Por fim, foi feito um estudo comparativo entre o método QUAD e os testes estatísticos para a identificação de erros.
After the adjustment of observations has been carried out by Least Squares Method (LSM), it is possible to detect and identify non-random errors in the observations using statistical tests. The reliability theory makes use of appropriate measures to quantify the minimal detectable bias (error) in an observation, and its influence on the adjusted parameters, if not detected. The conventional reliability theory has been developed for conventional testing procedures such as data snooping, which assumes that only one observation is contaminated by errors at a time. Recently, generalized measures of reliability has been developed, relating to statistical tests that assumes the existence, simultaneous, of multiple observations with errors (outliers). Other approaches to the quality control of the adjustment, alternatives to these statistical tests, were also proposed recently, such as the QUAD method (Quasi-Accurate Detection of outliers method). The goal of this research is to make a study about the quality control of the adjustment of geodetic observations, by means of experiments in a GPS (Global Positioning System) network, using both conventional methods and the current state of the art. In this way, comparisons were made between conventional reliability measures and generalized measures of reliability for two outliers, as well as comparisons between the data snooping procedure and statistical tests to identify multiple outliers. It was also investigated how the variances and covariances of the observations, as well as the geometry/configuration of the GPS network in study, can influence the measures of reliability, both in the conventional approach and in the generalized approach. Finally, a comparison was made between the QUAD method and the statistical tests to identify outliers (errors).
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Lehmann, Rüdiger. "A universal and robust computation procedure for geometric observations." Hochschule für Technik und Wirtschaft, 2017. https://htw-dresden.qucosa.de/id/qucosa%3A31843.

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This contribution describes an automatic and robust method, which can be applied to all classical geodetic computation problems. Starting from given input quantities (e.g. coordinates of known points, observations) computation opportunities for all other relevant quantities are found. For redundant input quantities there exists a multitude of different computation opportunities from different minimal subsets of input quantities, which are all found automatically, and their results are computed and compared. If the computation is non-unique, but only a finite number of solutions exist, then all solutions are found and computed. By comparison of the different computation results we may detect outliers in the input quantities and produce a robust final result. The method does not work stochastically, such that no stochastic model of the observations is required. The description of the algorithm is illustrated for a practical case. It is implemented on a webserver and is available for free via internet.
Der Beitrag beschreibt ein automatisches und robustes Verfahren, welches auf alle klassischen geodätischen Berechnungsprobleme angewendet werden kann. Ausgehend von vorgelegten Eingabegrößen (z.B. Koordinaten bekannter Punkte, Beobachtungen) werden Berechnungsmöglichkeiten für alle anderen relevanten Größen gefunden. Bei redundanten Eingabegrößen existiert eine Vielzahl von verschiedenen Berechnungsmöglichkeiten aus verschiedenen minimalen Untermengen von Eingabegrößen, die alle automatisch gefunden und deren Ergebnisse berechnet und verglichen werden. Wenn die Berechnung nicht eindeutig ist, aber nur eine endliche Anzahl von Lösungen existiert, dann werden alle Lösungen gefunden und berechnet. Durch den Vergleich verschiedener Berechnungsergebnisse können Ausreißer in den Eingabegrößen aufgedeckt werden und ein robustes Endergebnis wird erhalten. Das Verfahren arbeitet nicht stochastisch, so dass kein stochastisches Modell der Beobachtungen erforderlich ist. Die Beschreibung des Algorithmus wird an einem praktischen Fall illustriert. Er ist auf einem Webserver installiert und über das Internet frei verfügbar.
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Santos, Antonio José Prado Martins. "Proposta de ajustamento para melhoria da confiabilidade e precisão dos pontos de rede geodésicas para fins topográficos locais." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-27042006-152418/.

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Em levantamentos geodésicos planialtimétrico se faz necessário conhecer a qualidade das coordenadas estimadas de acordo com o tipo de aplicação a que se destinam. Este trabalho mostra de modo didático o estudo das teorias de análise de qualidade de rede GPS, baseando-se nas teorias de confiabilidade de rede propostos por Baarda, em 1968. As hipóteses estatísticas são fundamentais para elaboração dos testes para detecção de erros grosseiros (outliers), que constitui a base para a análise da confiabilidade de rede. Neste trabalho são propostas três estratégias, desenvolvidas em MathCAD, para a análise da qualidade do ajustamento. Os resultados obtidos foram comparados com os dos programas comerciais, Ski-Pro e Ashtech Solution, e também validados por medidas de campo feitas com estação total. As três estratégias propostas, para a rede em estudo implantada no Campus II da USP, apresentaram bons resultados
Geodetic planimetric survey requires the knowledge of the coordinates quality, estimated according to the final application. This work shows a didactic way on the study on theoretical analyses on quality of GPS networks, based on reliability network proposed by Baarda in 1968. Statistical hypotheses are fundamental to development of outliers’ detection tests, which consists the base for network reliability. In this work, three strategies are proposed, developed in MathCAD, to analyze adjustment quality. The results were compared with the results of two commercial programs, Ski-Pro and Ashtech Solution, and also field validation measurements with total station. The three proposed strategy, applied on a pilot network located at the Campus II of USP, gave good results
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Ribeiro, Fernando Cesar Dias. "Proposta de metodologia para verificação da estabilidade dos pilares de redes para monitoramento geodésico de barragens - estudo de caso." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-10112009-102642/.

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Um dos principais problemas no monitoramento das estruturas de uma barragem por meio de instrumentação geodésica se refere à confirmação da estabilidade dos pontos da rede geodésica de referência. Os eventuais deslocamentos detectados nas estruturas podem ser resultados de análises e interpretações equivocadas, já que os pontos de referência podem ser considerados estáveis sem indicação dessa condição. Considerando o objetivo deste trabalho, de verificar a estabilidade dos pilares da rede geodésica da Usina Hidrelétrica de ITAIPU por meio da tecnologia GPS, foi proposta uma metodologia que compreendesse o planejamento e a coleta dos dados, realizada em quatro épocas (campanhas) distintas, seguidos do seu processamento e ajustamento. No processamento dos dados verificou-se a melhor estratégia usando a fase da portadora L1, devido às linhas de base curtas (até 5km). Já no ajustamento, constatou-se a importância da detecção de erros grosseiros nas observações das linhas de base e também do controle de qualidade. Os resultados da aplicação desta metodologia foram as coordenadas ajustadas dos pilares da rede com as suas respectivas precisões para cada época. Estas coordenadas e suas matrizes variância-covariância foram então comparadas entre combinação de campanhas com a aplicação do teste de congruência global, para a verificação final da significância estatística das diferenças encontradas. Os resultados demonstraram que as investigações da estabilidade dos pilares da rede geodésica em estudo, dependem diretamente da qualidade das observações e do ajustamento, bem como da configuração da rede geodésica.
One of the main problems in dams structures monitoring by geodetic instruments is the confirmation of the stability of reference points in geodetic networks. The detection of displacements on the structures can bring results of wrong analysis just because the reference points assumed as stable points may be not. Considering the objective of this work which is to verify the stability of the pillars in ITAIPU Power Plant geodetic network by GPS, a methodology was proposed including the planning and field surveys of four campaigns in different epochs, followed by data processing and baseline adjustment. According to the results of data processing it was verified that the better strategy is process the carrier phase L1 because the baselines are short (up to 5km). Regarding the adjustment, it was confirmed the significance of observations blunders detection and quality control. The results of methodology application were the adjusted coordinates of each geodetic network pillar and the respective accuracy for each campaign. Those coordinates with its variance-covariance matrices were compared between the campaigns by means of global congruency test verifying if statistically significant differences would be found. The results demonstrated that the pillars stability of studied geodetic network is directly dependent of the observations and adjustment quality, and also of the geodetic network layout.
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Vasconcellos, José Carlos Penna de. "Estudo de metodologia para vinculação e homogeneização de redes geodésicas GPS: implementação de um programa de ajustamento." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-06072007-155106/.

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Usando o modelo de ajustamento apresentado por Schaffrin (2001), este trabalho apresenta uma metodologia para ajustamento de redes geodésicas GPS de densificação e extensão, a qual substitui com vantagem o tratamento clássico que utiliza um ajustamento livre seguido por uma \"transformação de Helmert\". A característica deste método é introduzir um procedimento estatisticamente ótimo, baseado no princípio dos mínimos quadrados, que permita ajustar a nova rede, vinculando-a a pontos fiduciais, e conectando-a a pontos de ligação com redes vizinhas de mesmo nível, considerados \"hierarquicamente superiores\" no processo. A técnica da \"propriedade reprodutora\" permite que esses pontos sejam ponderados em função das variâncias decorrentes de suas determinações, mas tenham suas coordenadas preservadas. Para a implementação dessa metodologia, foi desenvolvido um programa, em linguagem FORTRAN, que realiza o ajustamento vetorial da rede, utilizando o modelo paramétrico do método dos mínimos quadrados. O procedimento adotado consiste em fazer com que as variâncias dos pontos de injunção sejam introduzidas na nova rede, e que as coordenadas desses pontos, modificadas pelo ajustamento, sejam recuperadas. O programa apresenta também uma seqüência de testes que possibilitam a detecção, investigação e adaptação de possíveis erros encontrados.
By using the adjustment model presented by Schaffrin (2001), this work presents a methodology for the adjustment of GPS geodetic networks of densification and extension, which substitutes with advantage the classic treatment that uses a free net adjustment followed by a \"Helmert transformation\". The feature of this method is to introduce a statistically optimal procedure, based on least squares principle, that allows adjust the new network, linking it to fiducial points and connecting it to tiepoints with same level neighbor networks, all of them considered \"hierarchically superior\" in the process. The \"reproducing property\" technique allows that these points were weighed up as a function of the variances obtained in the preliminary determination, but they have their coordinates preserved. For this methodology implementation, a software in FORTRAN language was developed for the network vectorial adjustment, by using the linear parametric model of least-squares method. The adopted procedure allows the constraint point variances to propagate in the new network, but afterwards the coordinates of these points, changed in the adjustment, are retrieved. The software presents a sequence of tests to detect, to investigate and to analyze possible encountered errors, too.
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Books on the topic "Geodetic networks"

1

Kubáček, Lubomír. Statistical theory of geodetic networks. Zdiby: Výzkumný ústav geodetický, topografický a kartografický, Odvětvové informační středisko, 2013.

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Rüdja, Andres. Geodetic catums, reference systems and geodetic networks in Estonia. Kirkkonummi: Suomen Geodeettinen Laitos, 2004.

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Grafarend, Erik W., and Fernando Sansò, eds. Optimization and Design of Geodetic Networks. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70659-2.

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Lugoe, F. N. Rigorous densification of horizontal geodetic networks. [Fredericton, N.B.]: Dept. of Surveying Engineering, University of New Brunswick, 1985.

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Engsager, Karsten. Integration of satellite data in local geodetic networks. København: Kort & matrikelstyrelsen, 1998.

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Plane and geodetic surveying: The managment of control networks. New York: Spon Press, 2004.

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Teunissen, P. J. G. The geometry of geodetic inverse linear mapping and non-linear adjustment. Delft, The Netherlands: Rijkscommissie voor geodesie, 1985.

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Kravchenko, Yuriy. Surveying. ru: INFRA-M Academic Publishing LLC., 2017. http://dx.doi.org/10.12737/textbook_5900a29b032774.83960082.

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The contents of the book corre-sponds to the curriculum of surveying for building schools. Including historical and general information about on geodesy, the basic principles of treatment results of geodetic measurements, information about topographic maps and plans and solutions the problems with their use, description of instruments and methods of measurement of angles, distances and excesses on the earth surface, information about horizontal and vertical geo-detic networks, methods for creat-ing and processing survey geodes-ic networks, types and methods of survey, a description of the meth-ods removal projects in nature, description of the geodetic works in prospecting, designing and con-struction of objects capital con-struction.
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Belgrave, D. V. McMurdo Sound: Geodetic control network. Wellington: Dept. of Survey and Land Information, 1992.

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Moose, Robert E. The National Geodetic Survey Gravity Network. Rockville, MD: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, Charting and Geodetic Services, 1987.

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Book chapters on the topic "Geodetic networks"

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Meade, Buford K. "Geodetic Networks." In Contemporary Geodesy: Proceedings of a Conference Held at the Harvard College Observatory-Smithsonian Astrophysical Observatory, Cambridge, Massachusetts, December 1-2, 1958, 30–35. Washington D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm004p0030.

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Lu, Zhiping, Yunying Qu, and Shubo Qiao. "Geodetic Datum and Geodetic Control Networks." In Geodesy, 71–130. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41245-5_3.

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Brešar, Boštjan, Matjaž Kovše, and Aleksandra Tepeh. "Geodetic Sets in Graphs." In Structural Analysis of Complex Networks, 197–218. Boston: Birkhäuser Boston, 2010. http://dx.doi.org/10.1007/978-0-8176-4789-6_8.

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Bosy, J., B. Kontny, and A. Borkowski. "IGS/EPN Reference Frame Realization in Local GPS Networks." In Geodetic Reference Frames, 197–203. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_31.

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Sünkel, H. "Fourier Analysis of Geodetic Networks." In Optimization and Design of Geodetic Networks, 257–300. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70659-2_12.

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Teunissen, P. J. G. "Quality Control in Geodetic Networks." In Optimization and Design of Geodetic Networks, 526–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70659-2_18.

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Habrich, H. "Evaluation of Analysis Options for GLONASS Observations in Regional GNSS Networks." In Geodetic Reference Frames, 121–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00860-3_19.

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Grafarend, E. W., and F. W. Krumm. "Continuous Networks I." In Optimization and Design of Geodetic Networks, 301–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70659-2_13.

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Benciolini, B. "Continuous Networks II." In Optimization and Design of Geodetic Networks, 342–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70659-2_14.

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Grafarend, E. W. "Criterion Matrices for Deforming Networks." In Optimization and Design of Geodetic Networks, 363–428. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70659-2_15.

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Conference papers on the topic "Geodetic networks"

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Liepins, Ivars, and Maris Kalinka. "Analyses of Latvian National Geodetic Reference System." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.215.

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National geodetic reference system is base for geodetic and geospatial data and information obtaining, maintenance and distribution in common reference system in country. It means, that it must be as accurate as possible and lockstep with time. Latvian national geodetic reference system (LNGRS) derives from Soviet Union geodetic reference system at beginning of 90-ties last century. Development of LNGRS was done as historical continuation of practice to use height, coordinates, Earth gravitational and geomagnetic systems and national networks. For coordinates was established new Latvian geodetical coordinate system using one week campaign data of GPS NAVSTAR. Heights were kept in Baltic normal height system epoch 1977. Earth gravitational system was established newly by absolute gravimetric measurements. Geomagnetic system was developed as repeat station system. Earth is constantly change system internally and outwardly More growing use of GIS and GNSS in agriculture, construction, logistic, military and everyday life put new challenge for LNGRS and it reliability to actual situation in top level. Main goal of publication is to analyse all aspects of LNGRS against nowadays criteria and requirements of dynamic national geodetic reference system. Results of analyses show feeble and powerful sides of LNGRS.
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Michal, Ondrej. "OPTIMIZATION METHODS IN GEODETIC NETWORKS." In 16th International Multidisciplinary Scientific GeoConference SGEM2016. Stef92 Technology, 2016. http://dx.doi.org/10.5593/sgem2016/b22/s09.062.

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Dawidowicz, Agnieszka. "THE GEODETIC UTILITIES NETWORK SYSTEM FOR ENERGY NETWORKS." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b22/s11.142.

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Daszczuk, Wiktor, and Andrzej Belz. "Energy Constraints in Operation of Autonomous Transit Networks." In 2018 Baltic Geodetic Congress (BGC Geomatics). IEEE, 2018. http://dx.doi.org/10.1109/bgc-geomatics.2018.00039.

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Baricevic, Mladen. "SOFTWARE SUPPORT FOR FREE GEODETIC NETWORKS ADJUSTMENT." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/22/s09.071.

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Janus, Jaroslaw, and Piotr Bozek. "Identifying Real Transport Networks in Rural Areas on the Basis of Cadastral Data." In 2017 Baltic Geodetic Congress (BGC Geomatics). IEEE, 2017. http://dx.doi.org/10.1109/bgc.geomatics.2017.56.

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Siemaszko, Agata, Beata Grzyl, and Adam Kristowski. "Evidence-Based Risk Management for Civil Engineering Projects Using Bayesian Belief Networks (BBN)." In 2018 Baltic Geodetic Congress (BGC Geomatics). IEEE, 2018. http://dx.doi.org/10.1109/bgc-geomatics.2018.00042.

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Specht, Cezary. "COMPARATIVE ANALYSIS OF ACTIVE GEODETIC NETWORKS IN POLAND." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/22/s09.021.

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Reci, H., A. Stampolidis, N. Perparim, G. Tsokas, S. Bushati, R. Pašteka, and K. Qirko. "Gravity networks for the Geodetic Reference Framework of Albania." In 10th Congress of the Balkan Geophysical Society. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902633.

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Cao, Jianxiang, Bin Wu, and Minyong Shi. "Research on the neural networks and the geodetic number of the graph." In 2009 8th IEEE International Conference on Cognitive Informatics (ICCI). IEEE, 2009. http://dx.doi.org/10.1109/coginf.2009.5250702.

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Reports on the topic "Geodetic networks"

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Geodetic network to evaluate historical elevation changes and to monitor land subsidence in lower Coachella Valley, California, 1996. US Geological Survey, 1997. http://dx.doi.org/10.3133/wri974237.

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