Multi‐visibility maps of triangulated terrains

Autor:	Narcis Madern, Narcís Coll, Marta Fort, Joan Antoni Sellarès
Rok vydání:	2007
Předmět:	business.industry Graphics hardware Geography Planning and Development Visibility (geometry) Terrain Computer Science::Computational Geometry Library and Information Sciences Visualization Domain (software engineering) Set (abstract data type) Geography Computer graphics (images) Point (geometry) business ComputingMethodologies_COMPUTERGRAPHICS Information Systems Subdivision
Zdroj:	International Journal of Geographical Information Science. 21:1115-1134
ISSN:	1362-3087 1365-8816
DOI:	10.1080/13658810701300097
Popis:	Visibility computation on terrain models is an important research topic with many applications in Geographical Information Systems. A multi-visibility map is the subdivision of the domain of a terrain into regions that, according to different criteria, encodes the visibility with respect to a set of view elements. We present an approach for visualising approximated multi-visibility maps of a triangulated terrain corresponding to a set of view elements by using graphics hardware. Our method supports heterogeneous sets of view elements containing points, segments, polygonal chains and polygons and works for weak and strong visibility. Moreover, we are also able to efficiently solve approximated point and polygonal region multi-visibility queries. To illustrate the usefulness of our approach we present results obtained with an implementation of the proposed algorithms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::971f17ac8a65e7382690a6186157a551 https://doi.org/10.1080/13658810701300097 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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