Obtaining High Fidelity Triangular Regular Network from Only DEM Points

Author: Gökgöz, Türkay

Source: Cartographic Journal, The, Volume 47, Number 2, May 2010 , pp. 150-156(7)

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Abstract:

When the source data for the digital elevation model (DEM) are not known and any additional information or features such as skeleton lines of terrain is not available, a triangular regular network (TRN) is constructed with simple subdivision using one or two diagonals uniformly. Such a model gives inaccurate directions for interpolation because of the inaccurate diagonals used in triangulation and thereby, results in inaccurate contours representing artificial terrain features. In this study, a new method is developed based on slope information computed at DEM points determining accurate diagonals in the subdivision process, which is beneficial not only through the skeleton lines of a terrain but also all over the DEM. Consequently, it is shown that the proposed method is able to build a high fidelity TRN from a DEM without any additional information or features.

Keywords: slope; DEM; TRN; contours

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/000870409X12584524219009

Affiliations: Division of Cartography, Department of Geomatic Engineering, Yıldız Technical University, 34210 Esenler, Istanbul, Turkey

Publication date: 2010-05-01

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