说明：  java3d写的网络三维地理信息系统，支持三维地形显示，纹理影象加载，地形实时渲染，3ds模型的加灾，obj模型的加载．提供applet和jnlp两种浏览方式，服务器暂时只提供ＤＥＭ数据服务
(java3d write three-dimensional network of geographical information systems to support the three-dimensional terrain, texture image loading, terrain Real-time rendering, 3ds model increases disaster, obj loading model. Jnlp applet and provides two browser, server-only data services DEM)