摘要： 目前使用的GNetViewer9.0平台不提供Web上的自定义区域空间过滤功能，使得对指定区域内的信息查询十分困难。为此，在GIS基础功能的基础上，提出基于VML技术在客户端动态绘制自定义区域，通过有向边加权，基于数据库存储过程求解交点个数，快速检测出区域内信息，并使用组件技术进行封装。实践证明，该组件查询速度快、准确性高。
关键词:
自定义区域,
空间过滤,
VML技术
Abstract: As the currently used GNetViewer9.0 platform does not provide custom-area space filtering function on the Web, enabling the accurate information within the designated area is very difficult to query. Based on the basic function of GIS, this paper proposes a new method of dynamic drawing custom-area in the client-side based on VML technology, through a directed edge-weighted, to solve the intersection number based on database stored procedure, quickly to detect the accurate information within the designated area. Practice shows the fast component query speed and high accuracy.
Key words:
custom area,
space filtering,
Vector Markup Language(VML) technology
中图分类号:
耿伟, 王浩. 基于WebGIS的空间过滤组件研究[J]. 计算机工程, 2011, 37(4): 58-60.
GENG Wei, WANG Gao. Study on Space Filtering Component Based on WebGIS[J]. Computer Engineering, 2011, 37(4): 58-60.