ABSTRACT
Nowadays, there are many popular commercial GIS software, such as ArcGIS [1], MapInfo, MGE/GeoMedia and so on. These commercial GIS software common characteristics are expensive, and meanwhile these GIS software running efficiency is not ideal on web. In practice, users do not need so complicated WebGIS functions, and it is necessary to provide a light WebGIS, which includes some simple functions, such as map moving, map zooming in, map zooming out and GIS navigation functions. Based on this light WebGIS, many applications can be integrate into the WebGIS [2]. According to these requirements, some key technologies are researched such as GIS technique, XML technique [3], AJAX technique [4], SVG technique [5], metadata technique, information integration [6][7][8], organization technique of space GIS objects, decentralized map loading and some related technologies. A kind of triangle integration mode is proposed, and the algorithm is given. By means of the triangle integration model, the functions for displaying GTPN and querying information of the GTPN are implemented.
