Multi-resolution Morphological Representation of Terrains

Danovaro, E.; Floriani, L. De; Vitali, M.; Papaleo, L.

Multi-resolution Morphological Representation of Terrains

Files

045-051.pdf (256.96 KB)

Date

2006

Authors

Danovaro, E.
Floriani, L. De
Vitali, M.
Papaleo, L.

Publisher

The Eurographics Association

Abstract

Mesh-based terrain representations provide accurate descriptions of a terrain, but fail in capturing its morphological structure. The morphology of a terrain is defined by its critical points and by the critical lines joining them, which form a so-called surface network. Besides being compact, a morphological terrain description supports a knowledge-based approach to the analysis, visualization and understanding of a terrain dataset. Moreover, because of the large size of current terrain data sets, a multi-resolution representation of the terrain morphology is crucial. Here, we address the problem of representing the morphology of a terrain at different resolutions. The basis of the multi-resolution terrain model, that we call a Multi-resolution Surface Network (MSN), is a generalization operator on a surface network, which produces a simplified representation incrementally. An MSN is combined with a multi-resolution mesh-based terrain model, which encompasses the terrain morphology at different resolutions. We show how variable-resolution representations can be extracted from an MSN, and we present also an implementation of an MSN in a compact encoding data structure.

        @inproceedings{10.2312:LocalChapterEvents/ItalianChapConf2006/045-051
,
booktitle = {4th Eurographics Italian Chapter Conference
},
editor = {S. Battiato and G. Gallo and F. Stanco
},
title = {{Multi-resolution Morphological Representation of Terrains
}},
author = {Danovaro, E. and 
Floriani, L. De and 
Vitali, M. and 
Papaleo, L.
},
year = {2006
},
publisher = {The Eurographics Association
},
ISBN = {3-905673-58-4
},
DOI = {10.2312/LocalChapterEvents/ItalianChapConf2006/045-051
}
}