TRANSFORMATION OF CLASSICAL GEODETIC CONTROL NETWORKS 7TO INTERNATIONAL TERESTRICAL REFERENCE FRAME BY TRANSFORMATION GRIDS

2013 ◽  
Author(s):  
Oleg Odalovic
Keyword(s):  
Reference Frame ◽  
Control Networks ◽  
Geodetic Control

scholarly journals Applications of graph theory to gross error detection for GPS geodetic control networks

2002 ◽  
Vol 5 (4) ◽  
pp. 26-31 ◽  
Author(s):  
Samwel Katambi ◽  
Guo Jiming ◽  
Kong Xiangyuan
Keyword(s):  
Graph Theory ◽  
Error Detection ◽  
Gross Error Detection ◽  
Control Networks ◽  
Gross Error ◽  
Geodetic Control

Network-Aided Reduction of Slope Distances in Small-Scale Geodetic Control Networks

2021 ◽  
Vol 147 (4) ◽  
pp. 04021024
Author(s):  
Masoud Shirazian ◽  
Mohammad Bagherbandi ◽  
Hamed Karimi
Keyword(s):  
Small Scale ◽  
Control Networks ◽  
Geodetic Control

Strength of long lines in terrestrial geodetic control networks

1976 ◽  
Vol 50 (2) ◽  
pp. 169-180 ◽  
Author(s):  
V. Ashkenazi ◽  
P. A. Cross
Keyword(s):  
Control Networks ◽  
Geodetic Control

Geodetic Datum and Geodetic Control Networks

Geodesy ◽  
2014 ◽  
pp. 71-130 ◽  
Author(s):  
Zhiping Lu ◽  
Yunying Qu ◽  
Shubo Qiao
Keyword(s):  
Control Networks ◽  
Geodetic Control

scholarly journals Determination Of Horizontal Geodetic Control Networks For Engineering Objects Using Optoelectronic Techniques

2015 ◽  
Vol 98 (1) ◽  
pp. 39-51 ◽  
Author(s):  
Kazimierz Ćmielewski ◽  
Janusz Kuchmister ◽  
Piotr Gołuch ◽  
Izabela Wilczyńska ◽  
Krzysztof Kowalski
Keyword(s):  
Measurement Accuracy ◽  
Control Points ◽  
Control Networks ◽  
Laboratory Conditions ◽  
Optoelectronic Method ◽  
Geodetic Control ◽  
And Control ◽  
Horizontal Control

AbstractThe correctness of the geodetic service of an engineering object not seldom requires designing, alignment or renewing of geodetic situational control points. Building robots often cause that fixed situational control points are partly or completely inaccessible. For setting the position of these control points, there is worked out the methodology using the optoelectronic method. The prepared set of tools realizes the method’s assumptions and enables to determine the sides and control points based on the set of laser planes. In this article there is presented the innovative set of geodetic equipment for fixing horizontal control points. The presented set has been experimentally tested under laboratory conditions taking its functionality, operation range and applied accuracy into account. The measurement accuracy of the set of tools, resulting from identification of the energetic centres of laser planes’ edges, visualizing the sides of geodetic control networks, is within the range of ±0.02mm - ±0.05mm. There were also discussed exemplary versions of shapes and structures of horizontal geodetic control networks (regular and irregular), which are possible to be fixed with the use of the constructed set of tools.

The Adjustment and Analysis of Very Large Networks

1974 ◽  
Vol 28 (5) ◽  
pp. 653-662 ◽  
Author(s):  
Vidal Ashkenazi
Keyword(s):  
North American ◽  
Mesh Point ◽  
Large Networks ◽  
Control Networks ◽  
The North ◽  
Block Methods ◽  
Geodetic Control ◽  
Iterative Procedures

This paper is an abridged version of a communication, “An assessment of the proposed readjustment of the North American geodetic control networks,” which was presented at the Symposium. It reviews the current methods of solution and analysis of very large geodetic control networks. These include the Choleski decomposition compatible banded forms and corresponding mesh-point numbering techniques, rigorous block methods, iterative procedures and some recently used approximate techniques.

scholarly journals Gauss-Markov model with random parameters to adjust results of surveys of geodetic control networks

2021 ◽  
Vol 111 (1) ◽  
pp. 1-6
Author(s):  
Marek Banaś ◽  
Józef Czaja ◽  
Janusz Dąbrowski
Keyword(s):  
Markov Model ◽  
Covariance Matrix ◽  
Reference System ◽  
Reference Points ◽  
Model Parameters ◽  
Control Network ◽  
Control Networks ◽  
Spatial Reference ◽  
Weighting Matrix ◽  
Geodetic Control

Abstract Alignment of an engineering object project in the field is always conducted at the points of the geodetic control network, the coordinates of which are determined on the basis of the results of its elements survey and with connection to the national spatial reference system. The points of the national spatial reference system determined on the basis of previous surveys have specified coordinates with adequate accuracy, which is included in their covariance matrix. The coordinates of the geodetic control network points are determined more accurately than the points of the national spatial reference system and this means that the results of surveys of the geodetic control network have to be adequately incorporated into the coordinates of the reference points. In order to perform this incorporation, it may be assumed that the coordinates of the reference points are random, that is, they have a covariance matrix, which should be used in the process of adjusting the results of the geodetic control network observation. This research paper presents the principles for the estimation of the Gauss-Markov model parameters applied in case of those geodetic control networks in which the coordinates of the reference points have random character. On the basis of the observation equations δ + AX = L for the geodetic control network and using the weighting matrix P and the matrix of conditional covariances (P −1 + AC X A T ) for the observation vector L, the parameter vector X is estimated in the form of the derived formula X ^ = ( C X − 1 + A T PA ) − 1 A T P ⋅ L {\bf{\hat X}} = {\left( {{\bf{C}}_X^{ - 1} + {{\bf{A}}^T}{\bf{PA}}} \right)^{ - 1}}{{\bf{A}}^T}{\bf{P}} \cdot {\bf{L}} . The verification of these estimation principles has been illustrated by the example of a fragment of a levelling geodetic control network consisting of three geodetic control points and two reference points of the national spatial reference system. The novel feature of the proposed solution is the application of covariance matrices of the reference point coordinates to adjust the results of the survey of geodetic control networks and to determine limit standard deviations for the estimated coordinates of geodetic control network points.

scholarly journals Functionality and reliability of horizontal control net (Poland)

2020 ◽  
Vol 12 (1) ◽  
pp. 668-677
Author(s):  
Bogdan Wolski ◽  
Grzegorz Granek
Keyword(s):  
Process Model ◽  
Standard Procedure ◽  
Operating Time ◽  
Control Network ◽  
Control Points ◽  
Destruction Process ◽  
Control Networks ◽  
Geodetic Control ◽  
The Impact ◽  
Horizontal Control

AbstractHorizontal control networks established with monuments are functional if the conditions related to the number of control points, their density, condition and stability of coordinates are met. For functionality defined in those terms, deterministic accuracy characteristics are of little use. The subject matter discussed herein includes the two key features of geodetic control points, i.e., usability and stability. Due to the varying properties of those variables and the impact of the operating time of the system, there is no alternative to reliability-based approach in developing the functionality model. The measures of functionality and the procedures of data acquisition for developing the model of the control network destruction process have been defined. The solution presented herein is relevant for geodetic practice, providing a standard procedure for defining the time frame and the scope of the control network upgrading. The identified destruction process model optimizes this task assuming critical states expressed by the functionality probability. The applied approach is an example of the reliability theory-based approach typical for engineering. The issue of simulating the destruction process is illustrated with the results of the tests of class 3 control networks conducted in Kielce and Lodz regions in Poland. As a result of the tests, the characteristic properties of the control network destruction process have been identified. It was also shown how the patterns of usability and accuracy of the geodetic control points are relevant on the stage of implementing investment project tasks.

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