Analysis of the geometry of the TPI NETpro reference station network in Poland
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University of Agriculture in Krakow
Department of Land Surveying
Submission date: 2021-12-02
Final revision date: 2021-12-13
Acceptance date: 2021-12-14
Publication date: 2021-12-31
Corresponding author
Dawid Kudas
University of Agriculture in Krakow
Department of Land Surveying
30-198 Kraków, ul. Balicka 253a
Geomatics, Landmanagement and Landscape 2021;(4)
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ABSTRACT
Active geodetic networks currently perform many important tasks, including supporting satellite measurements with relative methods (e,g. Real Time Kinematic, Network Real Time Kinematic). For this reason, the geometries of reference station networks should meet certain standards both in terms of optimal distances between the reference stations as well as their spatial distribution. The paper presents a spatial analysis of the TPI NETpro commercial active geodetic network and a comparison of the obtained geometric parameters with the values calculated in relation to the national ASG-EUPOS network. Voronoi polygonization (also known as Dirichlet tessellation) and Delaunay triangulation were applied to assess the geometric dependence of the location of reference stations, while the nearest neighbour analysis was used to determine the degree of clustering of reference stations. The conducted analyses showed that the analysed network of TPI NETpro reference stations is characterised by a geometry similar to the national network ASG-EUPOS. The average distance between the neighbouring stations of the TPI NETpro network, expressed as the average length of the sides of Delaunay triangles built on this network, is 64.93 km, while the analysis of the nearest neighbour showed an average distance between stations of 41.97 km. The average distance connecting the TPI NETpro network points with the nearest neighbour from the ASG-EUPOS network is 25.20 km, and 41.06 km in the case of the three nearest neighbours. It has also been demonstrated that the ASG-EUPOS network points are more dispersed than the TPI NETpro network points.