I have this query :
SELECT ST_AREA(geom::geography) FROM region
The (geom) contains polygons from a shapefile imported into PostGIS with shp2pgsql. I've appended ::geography, else the result of the function was displayed in degrees. Now, I have this kind of answer :
How can I know in which units it is displayed ? square/meters ? square/foot ? I want it to be displayed in square/meters (m²) ou square/kilometers (km²)
How can I do that ?