Visualization of large spatial data in networking environments

Authors:
Liqiang Zhang;Chongjun Yang;Xiaohua Tong;Xiaoping Rui
Affiliations:
State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing Applications of Chinese Academy of Sciences, 100875, China;State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, 100101, China;Surveying Department, Tongji University, Shanghai, China;School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China
Venue:
Computers & Geosciences
Year:
2007

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Abstract

Rendering and interacting with high-resolution geographical data sets and complex models have become integral parts in a 3D GIS, in particular, in a web-based 3D GIS. Due to large data sets and narrow network bandwidth, general-purpose GIS can no longer visualize and manipulate these spatial data over networks in real time. This paper explores a way for building a Web-based 3D GIS application. The application aims to visualize and analyze large spatial data sets. We propose a novel 3D data model for representing the features of the terrain surface and 3D objects. A server-client architecture including progressive transmission methods and multiresolution representations are presented to help create the application. Together with a spatial index, the application provides an effective way for powerful access and manipulation of large-scale data sets. Finally, an experiment is performed using the geo-data to verify that the application works appropriately.