Geometric approaches to computing 3D-landscape metrics

  • Mihai Sorin Stupariu University of Bucharest, Faculty of Mathematics and Computer Science, Str. Academiei 14, 010014-Bucharest, Romania
  • Ileana Georgeta Pàtru-Stupariu University of Bucharest, Faculty of Geography, Bd. N. Balcescu 1, 010041-Bucharest, Romania
  • Roxana Cuculici University of Bucharest, Faculty of Geography, Bd. N. Balcescu 1, 010041-Bucharest, Romania
Keywords: 3D-analysis, Landscape metrics, Patch-corridor-matrix model, Relief, Triangulation

Abstract

The relationships between patterns and processes lie at the core of modern landscape ecology. These dependences can be quantified by using indices related to the patch-corridor-matrix model. This model conceptualizes landscapes as planar mosaics consisting of discrete patches. On the other hand, relief variability is a key factor for many ecological processes, and therefore these processes can be better modeled by integrating information concerning the third dimension of landscapes. This can be done by generating a triangle mesh which approximates the original terrain. The aim of this methodological paper is to introduce two new constructions of triangulations which replace a digital elevation model. These approximation methods are compared with the method which was already used in the computation of 3D-landscape metrics (firstly for parameterized surfaces and secondly for two landscape mosaics). The statistical analysis shows that all three methods are of almost equal sensitivity in reflecting the relationship between terrain ruggedness and the patches areas and perimeters. In particular, either of the methods can be used for approximating the real values of these basic metrics. However, the two methods introduced in this paper have the advantage of yielding continuous approximations of the terrain, and this fact could be useful for further developments.

Published
2010-10-22
How to Cite
(1)
Stupariu, M. S.; Pàtru-Stupariu, I. G.; Cuculici, R. Geometric Approaches to Computing 3D-Landscape Metrics. LO 2010, 24, 1-12.
Issue
Section
Research Article