There are some great open source WebGL terrain renderers out there, on a planetary scale, for example: http://doarama.com/view/2171 http://doarama.com/view/217

There are some great open source WebGL terrain renderers out there, on a planetary scale, for example: http://doarama.com/view/2171 http://doarama.com/view/2171 This is built on the Cesium open source virtual globe http://cesiumjs.org/ http://cesiumjs.org/