AplicaÃÃo da GeneralizaÃÃo CartogrÃfica em Mundos Virtuais

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

This work deals with the transposition of cartographic concepts and tools to virtual reality applications, using cartographic generalization in virtual urban worlds for tourism applications. Cartographic Generalization is an area in Cartography concerned with the generation of versions of cartographic maps. In virtual worlds, it can be implemented using Levels of Detail - LODs, but there are no known rules for constructing these levels automatically; most of the literature concentrates in polygon simplification. To get versions of maps, Cartography uses twelve operators, applied by the cartographer using domain-specific knowledge: simplification, smoothing, aggregation, amalgamation, merging, collapse, refinement, exaggeration, enhancement, displacement, classification and symbolization. An analysis of these operators is performed in the context of virtual reality. The cartographer domain-specific knowledge is modelled in knowledge rules in an expert system. This expert system is responsible for the selection of important objects and of the application of cartographic operators in virtual worlds. Three operators were implemented to virtual worlds: simplification, smoothing and symbolization. Finally, SisGen3D, a system for generalization virtual VRML worlds is presented. This system, developed in Java, modelled in UML and using the MySQL database, is validated using the Recife Antigo Virtual as a testbed

ASSUNTO(S)

mapas java generalizaÃÃo cartogrÃfica processamento de imagens image processing expert systems mundos virtuais simplification lods maps cartographic generalization ciencia da computacao virtual world lods simplificaÃÃo sistemas especialistas java

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