您好,一个是针对模型表面,另一个是针对整个模型,说实话差别不是特别大,具体您看帮助文档: http://support.supermap.com.cn/DataWarehouse/WebDocHelp/iDesktop/Features/SceneOperation/3DDesigner/TINTerrainOperation/TINSurfaceOperation.html http://support.supermap.com.cn/DataWarehouse/WebDocHelp/iDesktop/Features/SceneOperation/3DDesigner/TINTerrainOperation/TINBooleanOperation.html