[postgis-devel] More harping about questionable 3D

Obe, Regina robe.dnd at cityofboston.gov
Fri Oct 17 08:25:01 PDT 2008


Okay I'm beginning to question the benefit of these sort of 3D hacks.
In some cases it makes sense but for ST_Difference?  Really

SELECT ST_AsEWKT(ST_Difference(ST_GeomFromEWKT('MULTIPOINT(-118.58 38.38
5,-118.60 38.329 6,-118.614 38.281 7)'), ST_GeomFromEWKT('POINT(-118.614
38.281 5)')));
st_asewkt
---------
MULTIPOINT(-118.6 38.329 6,-118.58 38.38 5)	

Martin I think I was wrong about all of GEOS having these blue smurf
code gifts.  I think some of these may actually be in the PostGIS
code-base.  I'll need to trace the code closer though to determine the
root of this smurfiness, unless per chance someone knows.	
		
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