scholarly journals The Effect of Using Multiple Coordinate Systems and Datum Transformations on the Calculated Coordinates in Palestine

2020 ◽  
Vol 19 (1) ◽  
pp. 31-41
Author(s):  
Ghadi Younis
Keyword(s):  
Coordinate System ◽  
Spatial Data ◽  
Service Providers ◽  
Local Coordinate System ◽  
Geodetic Network ◽  
Coordinate Systems ◽  
The West ◽  
Transformation Methods ◽  
Gnss Data ◽  
Gis Software

AbstractThe recent developments in spatial data collection, management and software require the availability of proper geodetic infrastructures for integrating different types and sources of coordinates without causing effective changes in positions. Nowadays, positions are mostly collected by GNSS data collectors based on WGS84/ITRF reference systems. The data are then subjected to transformations and projections to a locally used system. Another possibility is direct data collection based on the local coordinate system by classical surveys using land surveying, photogrammetry, laser scanning, etc. The spatial data management is commonly operated using Geographic Information Systems (GIS) software for mapping, analysis, planning, and other services. The conversions between different coordinate systems should be well defined to guarantee the consistency of the coordinates on all systems and tools. In Palestine, the classical and local surveys are all based on the local coordinate system Pal1923Grid for engineering, cadastral and planning applications. The different GNSS RTK-service providers use different definitions and transformation methods between WGS84 or the International Terrestrial Reference Frames (ITRF) and the local Palestine1923Grid, whereas the Land authority has adopted a group of parameters to be implemented on the Global Navigation Satellite Systems (GNSS) data collectors, which do not fit with Palestine1923Grid properties. Additionally, different transformation methods are used in GIS applications for converting the coordinates between the different systems using WGS84 as an intermediate system. Here, the coordinates of a group of the geodetic network in the West Bank of Palestine are used to assess the accuracy of the different transformations and systems by comparing the transformed coordinates using the GNSS system and the originally registered coordinates. Furthermore, a grid of points covering the coordinate system extents is used to describe the differences between the transformations and systems. It was found that the parameters provided by GNSS service providers have results that are consistent with each other and the geodetic network in the West Bank of Palestine compared to GIS-software parameters. By contrast, all systems have extremely deteriorated coordinates in the Gaza strip and the further parts of the Pal1923Grid extents.

Determining the parameters of a local coordinate system with a non-standard longitude of the central meridian. Analysis of existing methods

2020 ◽  
Vol 960 (6) ◽  
pp. 2-12
Author(s):  
A.V. Vinogradov
Keyword(s):  
Coordinate System ◽  
Local Coordinate System ◽  
Geodetic Network ◽  
Systematic Errors ◽  
Central Meridian ◽  
Coordinate Systems ◽  
Preliminary Calculation

Processing the results of topographic and geodetic works is performed in local coordinate systems. The parameters of the local coordinate systems were established on the basis of SK-42 or SK-63 systems. At present, it is necessary to set new communication parameters with coordinate systems SK-95 and GSK-2011. In many MCSs, the central meridians do not coincide with the origin, and the coordinates of the starting points were obtained from the catalogs of the preliminary calculation geodetic network. To establish the new communication parameters, it is necessary to determine the longitude of the central meridian MCS in SK-95 and GSK-2011 systems. To find the errors in calculating the longitude of the central meridian, MCS the models were constructed with different positions of the central meridian relative to the origin. The longitude was calculated using well-known and new formulas and methods. Errors in calculating the longitude of the MSC are systematic. An increase in the calculation volume does not exclude the influence of systematic errors, reaching 4ʺ. For some lines, they make 8ʺ.

CONSTRUCTION OF FRAME GEODETIC NETWORK FOR ENGINEERING SURVEY OF RAIL TRANSPORT FACILITIES

2018 ◽  
Vol 12 (5-6) ◽  
pp. 58-71
Author(s):  
A. Yu. Matveev ◽  
I. P. Gavrilova ◽  
A. V. Kovyazin ◽  
E. V. Brovkov
Keyword(s):  
Coordinate System ◽  
High Speed ◽  
Local Coordinate System ◽  
Geodetic Network ◽  
Local System ◽  
Rail Transport ◽  
Reference Network ◽  
Coordinate Systems ◽  
Railway Traffic ◽  
Engineering Survey

Increasing the speed of trains along railroad tracks and the development of satellite geodetic technologies put forward new requirements for the production of the engineering survey at the rail transport facilities. Ensuring the safety of high-speed traffic is directly related to the accuracy of determining the coordinates and heights of the reference geodetic networks created for the design, construction, reconstruction and operation of railways. A large length of Railways in Russia requires solving a number of problems in the conditions of increasing the accuracy of determining the coordinates. High-speed route crosses several regions with its own local coordinate systems. Simplify the design and cadastral works and reduce to minimum linear distortions when performing geodetic measurements, allows the creation of a local coordinate system, unified for the entire route. The technology of creating a unified local coordinate system for linear objects passing through several 6-degree zones in the projection of GaussKruger and objects located at an angle to the axial Meridian is considered on the example of the railway Moscow — Saint-Petersburg — Vyborg. At the basis of a unified local system of the object, it is proposed to use an oblique cylindrical cartographic projection. Implemented a coordinate system in the form of the software, allowing to perform transformations between the local system, the world and state coordinate systems. The paper also considers the practical experience of creating a high-precision geodetic reference network for a high-speed railway traffic route, which can be used for various linear engineering structures. The created frame network can serve as a geodetic base for performing laser scanning, monitoring facilities, creating geoinformation systems and solving other problems that arise during the operation of an engineering facility.

Geocentric Coordinate Systems and Actual Problems of Modernization of the State Geodetic Network

2018 ◽  
Vol 931 ◽  
pp. 687-691
Author(s):  
Anastasia E. Dudnik ◽  
Oksana V. Germak ◽  
Maksim G. Govorukhin ◽  
Galina K. Tupoleva
Keyword(s):  
Coordinate System ◽  
Russian Federation ◽  
Geodetic Network ◽  
The State ◽  
Coordinate Systems ◽  
The Russian Federation ◽  
Geodetic Coordinate System ◽  
Geocentric Coordinate System

The article describes the state of the geocentric coordinate system of the Russian Federation. Current problems of the geodetic coordinate system are described, and a method for solving this problem is proposed.

A standard local coordinate system for multipole refinements of the estrogen core structure

2003 ◽  
Vol 36 (6) ◽  
pp. 1464-1466 ◽  
Author(s):  
Kristin Kirschbaum ◽  
Kumaradhas Poomani ◽  
Damon A. Parrish ◽  
A. Alan Pinkerton ◽  
Elizabeth Zhurova
Keyword(s):  
Coordinate System ◽  
Local Coordinate System ◽  
Population Parameters ◽  
Coordinate Systems ◽  
Valence Electron Density ◽  
The Common ◽  
Highly Correlated ◽  
The Stability ◽  
Hybrid Orbitals ◽  
Density Study

A comparative charge density study on a series of estrogen derivatives has been initiated. The study utilizes the Hansen–Coppens atom-centred multipole model to describe the valence electron density distribution. Direct comparison of the population parameters for each estrogen after the respective multipole refinements requires standardization of the atom-centred local coordinate systems. Such a standard coordinate system for the common estrogen core is reported, taking advantage of the shape of those multipoles which have the spatial characteristics ofsp2andsp3hybrid orbitals. Additionally, populating these principal multipoles at the beginning stage of the refinements improves the stability of these large highly correlated calculations.

scholarly journals Concept of spatial coordinate systems, their defining and implementation as a precondition in geospatial applications

2015 ◽  
Vol 95 (4) ◽  
pp. 77-102
Author(s):  
Zoran Nedeljkovic ◽  
Aleksandar Sekulic
Keyword(s):  
Geographic Information Systems ◽  
Coordinate System ◽  
Spatial Data ◽  
Spatial Databases ◽  
Spatial Information ◽  
Reference Network ◽  
Abstract Entity ◽  
Coordinate Systems ◽  
Definition Of ◽  
Geodetic Reference Frame

There are many users of spatial information, and quite large interest about the nature and genesis of such information. Different users found spatial information in the form of maps, plans or alphanumerical tables. Recently, there are more often in the form of spatial databases, and in the form of geographic information systems. What is behind these spatial data? On what foundation are they designed? In this article we look at the basic aspects of space, dimensionality and global coordinate systems in applications of global geospatial research. Here is explained the definition of the coordinate system as an abstract entity and, consequently, its implementation or establishment in the form of a geodetic reference frame, as real geodetic reference network. The applicative aspect of coordinate systems in this article is emphasized through recommendations and considerations during usage of their different implementations.

Refinement of transformation algorithms for the transitions between state coordinate system and cities local coordinate system

2017 ◽  
Vol 927 (9) ◽  
pp. 2-7
Author(s):  
V. T. Zalutsky
Keyword(s):  
Coordinate System ◽  
Local Coordinate System ◽  
Real Data ◽  
Equivalent Transformation ◽  
Coordinate Systems ◽  
Production Activity ◽  
Transformation Algorithms ◽  
Engineering Survey ◽  
Coordinates Transformation ◽  
Common Logic

Some improvements of the coordinates transformation algorithms, related with application of the cartographic plane coordinates in the Russia’s state coordinate system(SCS) and local coordinate systems of the cites(LCSC), are presented in the article. A comparative analysis of the cited sources allowed to eliminate discovered misspells. After corrections, the formulae were revised using a common logic of transformation and notation system. As a result the author obtained three groups of equivalent transformation algorithms, they implement the «direct» (from SCS to LCSC) and «inverse» (from LCSC to SCS) transitions. Compiled algorithms preserve the identity of sources and authors. Checking of the updated algorithms performed using the test examples from well knowing manuals. Computations according to the considered algorithms with data from one of the examples are demonstrated in the final part of the article. Practical verification of the work of the above mentioned algorithms on real data was repeatedly performed in the course of the production activity of the Engineering Survey Department of the Irkutskzheldorproekt Institute. In particular, in works related to research for the design of reconstruction and repair of railway tracks, with the updating of obsolete engineering and topographic plans of stations, also using catalogs of coordinates of points of the special reference system of the East Siberian Railway.

scholarly journals TRANSFORMATION OF SPATIAL DATA INTO THE STATE GEODETIC COORDINATE SYSTEM OF 2011 IN GIS SOFTWARE

2021 ◽  
Vol 26 (5) ◽  
pp. 27-39
Author(s):  
Vladimir I. Obidenko ◽  
◽  
Sergey R. Gorobtsov ◽  
Keyword(s):  
Spatial Data ◽  
Coordinate Transformation ◽  
Data Sets ◽  
Coordinate Systems ◽  
Actual Problem ◽  
Additional Costs ◽  
Spatial Data Sets ◽  
Gis Software ◽  
Geodetic Coordinate System ◽  
Global Parameters

The article describes the implementation of the coordinate transformation procedures in GIS (on the example MapInfo Professional) between the existing in the country coordinate systems (SC-42, SC-95, MCS, based on them) and SCS-2011, allowing the reader to learn how to calculate the parame-ters of Helmert transformations between these coordinate systems using GOST 32453-2017. The article notes the problem of the transformation accuracy on the global parameters established by GOST 32453-2017 and the resulting need to determine local versions of these parameters, leading to the creation of uncoordinated spatial data sets in GSK-2011, additional costs and complicating work of consumers. In order to solve this problem, it is proposed to consider the formulation of the task of transition to the implementation of cadastral work from coordinate systems based on SС-42 to MСS, created at SCS-2011, as an actual problem of improving the geodetic support of the country

Reference Ellipsoid Misalignment, Deflection Components and Geodetic Azimuth

1985 ◽  
Vol 39 (2) ◽  
pp. 123-130 ◽  
Author(s):  
Petr Vaníček ◽  
Galo Carrera
Keyword(s):  
Coordinate System ◽  
Geodetic Network ◽  
Reference Ellipsoid ◽  
Coordinate Systems ◽  
Misalignment Effect ◽  
Terrestrial System ◽  
The Earth ◽  
Geocentric Coordinate System

Whichever way the geodetic reference ellipsoid, used as a horizontal datum, is oriented within the earth it is theoretically never exactly aligned with the geocentric coordinate system (called here Conventional Terrestrial System). It is then important to know just how much the misalignment affects the pertinent geodetic quantities in the horizontal geodetic network: the azimuth and the deflection components. The misalignment effect on these geodetic quantities must be accounted for to maintain the consistency of all the involved coordinate systems and transformations between them.

Determining the parameters of a local coordinate system with a non-standard longitude of the central meridian. Ways to improve the accuracy of determining parameters

2021 ◽  
Vol 972 (6) ◽  
pp. 2-9
Author(s):  
A.V. Vinogradov
Keyword(s):  
Coordinate System ◽  
Local Coordinate System ◽  
The State ◽  
State System ◽  
Central Meridian ◽  
Mathematical Apparatus ◽  
Coordinate Systems ◽  
Starting Point ◽  
The Difference ◽  
Residual Errors

Improving the accuracy of calculating the longitude of the axial meridian, the coordinates of the starting point and the height of the local coordinate system is achieved through introducing an intermediate coordinate system. The longitude of the axial meridian of the intermediate coordinate system is chosen equal to the approximate value of the longitude of the axial meridian of the local coordinate system. The difference in longitudes of the axial meridians of the state coordinate system and the intermediate coordinate system is known. The final value of the axial meridian`s longitude of the local coordinate system relative to the longitude of the axial meridian of the state coordinate system is calculated as the sum of two longitude differences. The first is the difference between the axial meridians of the local and the intermediate coordinate systems; the second is the difference in longitudes between the axial meridians of the intermediate and the state system. The residual errors of the mathematical apparatus for calculating the longitude of the axial meridian are less than 0.005 arc seconds. The proposed technology has been tested at real works.

Outlier detection by the EM algorithm for laser scanning in rectangular and polar coordinate systems

2015 ◽  
Vol 9 (3) ◽  
Author(s):  
Karl-Rudolf Koch ◽  
Boris Kargoll
Keyword(s):  
Em Algorithm ◽  
Coordinate System ◽  
Linear Model ◽  
Laser Scanning ◽  
Local Coordinate System ◽  
Polar Coordinates ◽  
Polar Coordinate System ◽  
Coordinate Systems ◽  
The Em Algorithm ◽  
Polar Coordinate

AbstractTo visualize the surface of an object, laser scanners determine the rectangular coordinates of points of a grid on the surface of the object in a local coordinate system. Vertical angles, horizontal angles and distances of a polar coordinate system are measured with the scanning. Outliers generally occur as gross errors in the distances. It is therefore investigated here whether rectangular or polar coordinates are better suited for the detection of outliers. The parameters of a surface represented by a polynomial are estimated in the nonlinear Gauss Helmert (GH) model and in a linear model. Rectangular and polar coordinates are used, and it is shown that the results for both coordinate systems are identical. It turns out that the linear model is sufficient to estimate the parameters of the polynomial surface. Outliers are therefore identified in the linear model by the expectation maximization (EM) algorithm for the variance-inflation model and are confirmed by the EM algorithm for the mean-shift model. Again, rectangular and polar coordinates are used. The same outliers are identified in both coordinate systems.

Sign in / Sign up

Export Citation Format

Share Document