VECTORIAL GEOGRAPHIC DATA VISUALIZATION ON MULTI-RESOLUTION TERRAIN / VISUALIZAÇÃO DE DADOS GEOGRÁFICOS VETORIAIS SOBRE TERRENOS EM MULTI-RESOLUÇÃO

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This work aims to integrate the graphical representation of vectorial data found in Geographic Information Systems (GIS) and the visualization for multi-resolution 3D terrain models. The multi-resolution approach on terrain rendering brings some difficulties on the process of rendering the vectorial data in a consistent manner, since these data, in general, only store bi-dimensional information. The solutions most commonly used are based on conventional texture mapping, resulting in low visual quality. In order to improve image quality, we adopt texture mapping with perspective correction, in a way similar to the techniques used for shadow map generation. Besides, willing to obtain efficiency on complex vectorial data visualization, a multi-resolution algorithm of these data is presented. In our proposed solution, vectorial data simplification is decoupled from the multi-resolution technique used on the tri-dimensional terrain model. Thus, our solution can be used with different terrain viewers. We present results that illustrate the efficiency of the proposed solution.

ASSUNTO(S)

geographic data simplification simplificacao de dados geograficos terrenos em multi-resolucao geographical information systems multi-resolution terrain sistemas de informacao geografica

ACESSO AO ARTIGO

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