OsgEarth是一个跨平台的库，可以使用版本号为2.6.2或更新版本的Cmake对其进行编译。-OsgEarth is a cross-platform library, you can use the version number is 2.6.2 or later Cmake compile it.

此文档是我学习OSG做的技术总结报告，详细讲解了OSG、OSGearth的编译，开发，osg原理，视点变换矩阵、全球地形解决方案等。-This document is do I learn OSG technical summary report, a detailed account of OSG, compiled OSGearth, development, osg principle viewpoint transformation matrix, the global terrain