Método para la visualización 3d de modelos digitales de elevación. (Revisión)

Edwin Antonio Mero Lino; María Mercedes Ortiz Hernández; Cristian José Alava Mero; Jimmy Leonardo Gutiérrez García

Authors

Edwin Antonio Mero Lino Universidad Estatal del Sur de Manabí
María Mercedes Ortiz Hernández Universidad Estatal del Sur de Manabí
Cristian José Alava Mero Universidad Estatal del Sur de Manabí
Jimmy Leonardo Gutiérrez García Universidad Estatal del Sur de Manabí

Keywords:

GPU; restricted quadtree; multiresolution triangulation; 3D visualization

Abstract

The visualization of geographic information on the Web represents an area of science that has gained importance with scientific and technical development. The methods commonly used perform the processing of information on the servers generating images that are sent to the client stations for viewing. However, the way of representing the information generates high data traffic from the server stations to the client stations and the computation resources used by the client stations are not exploited. The present investigation describes a solution to the problematic raised from the implementation of a model for the efficient visualization of land surfaces in three dimensions on the Web platform. The proposed method exploits the resources available in the client computer, achieving high quality visualizations with tens of frames per second. For the visualization of the information, a logical division of the terrain is made in quadrants, allowing the computer to make use of a spatial data structure (fttree) to manipulate the requests to the server as well as the operational memory control of the data associated with those quadrants that are being visualized. It also describes a triangulation model based on the Restricted Quadtree (RQT) and details the process of simplification and prevention of cracks.

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