Visualization of large spatial data in networking environments
- 作者：Liqiang Zhang ; Chongjun Yang ; Xiaohua Tong ; Xiaoping Rui
- 关键词：3D GIS ; Data models ; Client/server ; Progressive data transfer ; Interactive visualization
- 刊名：Computers and Geosciences
- 出版年：2007
- 期刊代码：16_00983004
- 类别：ear
- 出版时间：September 2007
- 卷：33
- 期：9
- 页码：1130-1139
- 文件大小：881 K
摘要
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.