[postgis-devel] Issue 83 in postgis: ST_Multi on curved polygon gives ERROR: Unknown geometry type: 0

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Comment #1 on issue 83 by mark.cav... at siriusit.co.uk: ST_Multi on curved  
polygon gives ERROR:  Unknown geometry type: 0
http://code.google.com/p/postgis/issues/detail?id=83

Ah I see the problem here - it's related to the fact that the code in
LWGEOM_force_multi assumes that it can convert a base geometry to its  
equivalent
MULTI type just by adding 3 to the geometry type identifier. And of course  
this
doesn't hold for the CURVEPOLYGON type. I've no idea why this didn't fail  
in 1.3.3,
although I suspect its old behaviour was just random luck.

Adding a fix is fairly simple, although I'm not exactly sure what the  
behaviour
should do. Anyone know what ST_Multi() on a CURVEPOLYGON should return?


ATB,

Mark.


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