ST_YMin function to return the minimum Y-coordinate of a raster object - PolarDB

Returns the minimum Y-coordinate of a raster object.

Syntax

float8 ST_YMin(raster raster_obj)

Parameter	Description
`raster_obj`	The raster object.

Returns the minimum Y-coordinate of the raster object. If the raster object is not georeferenced, the function returns 0.

The following example queries the minimum Y-coordinate of rasters in raster_table.

select ST_YMin(rast)
from raster_table;

Output:

 st_ymin
----------
      30