论地球空间信息的3维可视化:基于图形还是基于影像

3D Visualization of Geospatial Information:Graphics Based or Imagery Based

地球空间信息3维可视化已经和大众化、开放性、可量测、可挖掘一并成为信息化服务的基本要求。基于图形信息的3维可视化和基于影像信息的3维可视化是实现地球空间信息3维可视化的两种主要技术途径,本文结合典型应用实例,对这两类方法的基本原理、技术内涵及表现形式进行概括,比较它们各自的优缺点和适用范围,指出将两者优化组合是当前地球空间信息3维可视化应用的一个显著特征,能在某种程度上实现GIS3维可视化既经济又高效的目标,更好的适应未来空间信息服务需求的多样性。

3D visualization of geospatial information has constituted one of the basic requirements of geo-information service nowadays,along with popularity,openness and capabilities of target-measuring and knowledge-min-ing.Currently,there are two major technical routines for 3D visualization of geospatial information,that is,the graphics based and the imagery based approaches.This paper elaborates the basic principles,technical connotation and manifestations of these two types of approaches,with some typical application instances illustrated correspondingly,then compares their advantages and disadvantages as well as the application scopes.It is a signif-icant feature to adopt the graphics based and imagery based techniques together in the current applications,and by such a combined strategy,the 3D visualization of geospatial information can be accomplished economically and efficiently to a certain degree,thus will meet the versatile requirements of geoinformation service better.