并从空间数据 应用角度出发,详细阐述了数据格式转换法、坐标系转换与投影变换法、几何纠正法等三种常用空间数据集成方法的基本原理。 -And starting from the application point of view of spatial data, to elaborate the basic principles of the method of data format conversion, coordinate system conversion and projecti