[postgis-devel] Testing ST_LineMerge issue

[Mark Cave-Ayland]

Obe, Regina wrote:

> Now there are 2 issues here.
> 
> 1) GEOS ST_LineMerge is obviously not smart enough to realize that
> linemerging something like that is silly.

Ooops :)

> 2) ST_MakeLine lets you get away with creating this monstrosity.  Which
> hmm I suppose there are reasons why someone may want to, but perhaps we
> shouldn't go there.

This reminds me actually, what is the OGC-SFS take on repeated points? I 
  don't remember seeing any mention of this in any of the 
parser/unparser work I did earlier, although it seems to be required for 
a geometry to be valid. So is it also required for a geometry to be simple?


ATB,

Mark.

-- 
Mark Cave-Ayland
Sirius Corporation - The Open Source Experts
http://www.siriusit.co.uk
T: +44 870 608 0063