是osg中关于osgDem的组要模块GDAL和OGR的各个接口帮助说明，对osgDEM的使用具有重要作用-Is osg group on osgDem to GDAL and OGR module to help explain the various interfaces, the use of the osgDEM play an important role

用osgdem生成的3D地球,MFC界面，osg初学者的一个很好的例子，可放大缩小，可加添加控件-osg code of the 3D earth,a good example for osg studying

自从OpenSceneGraph2.0后，osgdem已从OSG中移出，作为单独的一个部分VirtualPlanetBuilder来发展。随着VirtualPlanetBuilder的不断发展，最终有可能成为ＯＳＧ处理地形的等的专用工具。-Since OpenSceneGraph2.0 osgdem has been removed from the OSG, as part of a separate VirtualPlanetBuilder to development. With the