一个很棒的基于java的开源GIS系统OpenMap(TM)。-OpenMap is a Java Beans based toolkit for building applications and applets needing geographic information. Using OpenMap components, youcan access data from legacy applications, in-place, in a distributed setting.

Openlayer地图开源库的高阶应用，是对beginner的补充和淬炼(Nowadays, OpenLayers is the most complete and powerful open source Javascr ipt library to create any kind of web mapping application. In addition to offering a great set of components, such as maps, layers, or con