In the terminology of the Spatial Extender, this is the Spatial Reference system (SRS), a combination of an earth-based coordinate system and a set of numeric conversion parameters.
在Spatial extender术语中,这是Spatial Reference System (SRS),它组合了基于地球的坐标系和一组数字转换参数。
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As an important part of GIS platform, spatial reference system includes coordinate transformation and map projection, also named as map projection transformation system.
It is suggested that transformation relation between spatial local coordinatesystem and integral coordinate system be established by vector method, which simplifies coordinate calculation of to.