This function calculates the histogram of a band set of a raster object.
Syntax
raster ST_BuildHistogram(raster raster_obj);
Parameters
Parameter | Description |
---|---|
raster_obj | The raster object. |
Examples
DO $$
declare
rast raster;
begin
select raster_obj into rast from raster_table where id = 1;
rast = st_buildhistogram(rast);
update raster_table set raster_obj = rast where id = 1;
end;
$$ LANGUAGE 'plpgsql';