[postgis-users] RE: Area units

[David Blasby]

YC Nyon wrote:

> I was querying a polygon object using the Postgis "area2d(geometry)".
> It returned a value which is too big ( 669,836,602.1790).
> I believe it was before I didn't set any projection. My srid is -1.
>
> Can anyone confirm this?

area() just does its calculations in the coordinate system of your data.
If you're data is meters, you'll get square meters.  If its feet, you'll
get square feet.

dave