[postgis-devel] Issue 31 in postgis: Negative distance buffer

[codesite-noreply at google.com]

Issue 31: Negative distance buffer
http://code.google.com/p/postgis/issues/detail?id=31

Comment #3 by joaofgo:
Hi!
Any progress about this issue? I've been continuously testing this 
problem over more
than 20 valid datasets, and keep getting the same error/behaviour for 
the st_buffer
function. Sometimes the number of non-buffered rings is quite small in 
other cases
(for very large multi/polygons with hundreds of rings) is very high.

  I also found that in some cases, using simple polygons with no rings, 
they don't get
negatively or positively buffered at all. I've also found differential 
behaviour when
trying to buffer (+ or -) valid GEOMETRYCOLLECTIONs, MULTIPOLYGONs or 
POLYGONs, and
that the last achieves the most complete results for all the geom types.

 Buffer function needs to be reviewed and some geometrical aspects of buffer
aspect/configuration/generation really need to be clarified and 
improved, mainly
because it severely affects many aspects when performing spatial 
analysis and
querying. I hope this helps to strengthen the case.




-- 
You received this message because you are listed in the owner
or CC fields of this issue, or because you starred this issue.
You may adjust your issue notification preferences at:
http://code.google.com/hosting/settings