[postgis-devel] Geometry emptiness explained (was Re: GML for empty geometries ?)

[Mateusz Łoskot]

On 14 December 2011 17:18, Paul Ramsey <pramsey at opengeo.org> wrote:
> Based on 30 seconds of research I'd say go with NULL as the return for
> empty geometries.
> Yes, 'POINT EMPTY' (and all the other typological variants) is legal
> in WKT. (But the concept of EMPTY appears completely ignored in all
> discussions of WKB.) (Standards rule.)

I dare to hijack the thread and ask, would it be a good idea
if PostGIS documentation includes explanation of empty geometries
according to popular specifications, at least those supported as input/output
(GML, WKT, WKB, GeoJSON)?
Q&A in one place, easily reachable for users, presumably in the FAQ.

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net
Charter Member of OSGeo, http://osgeo.org
Member of ACCU, http://accu.org