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Article

Adjusting the Regular Network of Squares Resolution to the Digital Terrain Model Surface Shape

1
Department of Geodesy, Institute of Geodesy and Civil Engineering, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1, 10-719 Olsztyn, Poland
2
Department of Geoinformation and Cartography, Institute of Geodesy and Civil Engineering, University of Warmia and Mazury in Olsztyn, Heweliusza 12, 10-720 Olsztyn, Poland
*
Author to whom correspondence should be addressed.
ISPRS Int. J. Geo-Inf. 2020, 9(12), 761; https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9120761
Received: 28 November 2020 / Revised: 15 December 2020 / Accepted: 17 December 2020 / Published: 20 December 2020
A regular network of squares is formed by points uniformly distributed (mostly in the square corners) over the surface that is represented by the network. Each point (node) of the network has specified coordinates (X and Y) with a fixed constant distance between them. The third coordinate in a node (H) is determined by the application of interpolation based on the points distributed (usually dispersed as a point cloud e.g., from LiDAR) over the surface of the area surrounding the node. The regular network of squares formed in this manner allows the representation of a digital terrain model (DTM) to be performed in spatial information systems (SIP, GIS). The main problem that arises during the construction of such a network is the proper determination of its resolution (the base distance between the coordinates X and Y) depending on the topography. This article presents a method of the regular network of squares resolution determination depending on the morphological shape of the terrain surface. Following the application of the procedures being described, a differently shaped terrain is assigned various network densities. This enables the minimisation of inaccuracies of the surface model being formed. Consequently, a regular network of squares is formed with different base square sizes, which is adjusted with its resolution to the morphology of the surface it describes. Such operations allow the terrain model accuracy to be maintained over the entire area while reducing the number of points stored in the DTM database to the minimum. View Full-Text
Keywords: regular network of squares; digital terrain model; surface modelling; interpolation algorithms; LIDAR regular network of squares; digital terrain model; surface modelling; interpolation algorithms; LIDAR
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MDPI and ACS Style

Gościewski, D.; Gerus-Gościewska, M. Adjusting the Regular Network of Squares Resolution to the Digital Terrain Model Surface Shape. ISPRS Int. J. Geo-Inf. 2020, 9, 761. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9120761

AMA Style

Gościewski D, Gerus-Gościewska M. Adjusting the Regular Network of Squares Resolution to the Digital Terrain Model Surface Shape. ISPRS International Journal of Geo-Information. 2020; 9(12):761. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9120761

Chicago/Turabian Style

Gościewski, Dariusz, and Małgorzata Gerus-Gościewska. 2020. "Adjusting the Regular Network of Squares Resolution to the Digital Terrain Model Surface Shape" ISPRS International Journal of Geo-Information 9, no. 12: 761. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9120761

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