虚拟地理环境和地学认知检验——以澳大利亚维多利亚省卡集洼汇水盆地为例  

Exploration on geo-environment simulation and cognitive verification: a case study at Cudgewa catchment in Victoria, Australia

作　　者：陈小钢[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101

出　　处：《地理研究》2003年第2期245-252,T003,共9页Geographical Research

基　　金：中国科学院地理科学与资源研究创新前沿项目 (CX10G D0 0 0 3 0 2 ) ;国家教育部出国留学基金 (2 0 0 0 )

摘　　要：虚拟环境技术以GIS图形图像数据、景观纹理等信息为输入 ,利用高性能的计算机图形设备和技术 ,生成具有近似真实感受效果的模拟环境 ,便于认知主体以更自然的交互方式、更直观的视景、更逼真的感受探索虚拟环境 ,形成对现实环境的正确认识 ,开发空间智能。本文以澳大利亚维多利亚省卡集洼 (Cudgewa)汇水盆地为实验地 ,应用虚拟环境技术 ,模拟现实环境。然后 ,应用认知科学的方法 ,检验虚拟环境技术应用的有效性、虚拟地理环境的真实性和环境认知的可靠性 。This paper introduces a preliminary stage of this development with Cudgewa catchment in Northeast of Victoria, Australia as a case area: the building of the 3D models from GIS data sets, construction of different simulated environments, and a group survey of the cognitive verification of simulated environments Our research development involves the following major phases: 1) creation of geo database and texture library, 2) data processing, 3) 3D modeling, simulating and rendering, 4) interactive visualization and 5) effective testing In the PC environment, ArcView 3 2 (and more recently ArcGIS 8) with multi extensions is used for data format conversion, feature generation, two dimensional mapping and three dimensional visual analysis Smart Image and ERDAS Orthobase have been used for aerial photo processing, registration and mosaicing, and Photoshop 6 0 for texture creation and image format conversion The real time 3D system has been developed using Performer and OpenGL libraries under IRIX (Silicon Graphics) operating systems Immersion is provided by the use of three screens and three projectors to give a 135 degree field of view Further, we have undertaken an 'acceptability of landscape simulation' survey Subjects with various backgrounds were included at different stages of survey Presently, 63 undergraduate and graduate students had responded They were exposed to pairs of static computer simulated images and real digital photographs These showed different combinations of fore, middle and background vegetation, buildings and fences The major tasks were inclusive of collecting sufficient data on the understanding of simulation, the perception of scenic beauty and the degree of realism A series of questions about the identification of features and cognitive understanding and level of ease of interpretation of images were asked The difference of cognitive aspects will be identified and explained As the tests develop, dynamic, interactive, semi immersive simulated environment i

关 键 词：澳大利亚 卡集洼汇水盆地 虚拟环境技术 地理环境模拟 地学认知 GIS 地理信息系统 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP391.9[天文地球—测绘科学与技术]