Name
ST_SRID — 返回在spatial_ref_sys表中定义的栅格的空间参考标识符。
Synopsis
integer ST_SRID(raster rast);
描述
返回在 Spatial_ref_sys 表中定义的栅格对象的空间参考标识符。
![[Note]](../images/note.png)
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Non-georeferenced rasters and geometries use SRID 0. |
示例
SELECT ST_SRID(rast) As srid
FROM dummy_rast WHERE rid=1;
srid
----------------
0