[postgis-users] geos result sets

[Paul Ramsey]

What would be the result if we were using JTS/GEOS with a precision 
model more coarse than the differences between the vertices? IE, a 0.1 
meter precision?

Paul Ramsey wrote:

> Thanks for the checks Martin. I think the standard that ArcView works to 
> is "good enough for government work", or "plus or minus something or 
> other".
> 
> JTS/GEOS is so good it starts to beg the question -- how good is *too* 
> good? :)
> 
> Martin Davis wrote:
> 
>> I thought I better leap to the defence of JTS/GEOS.  I've analyzed the
>> situation and (no surprise to me) found that the results from GEOS are
>> correct.  The Within=FALSE result is caused by a slight difference in
>> the vertices in the two coverages. 
> 
> 
> 


-- 
       __
      /
      | Paul Ramsey
      | Refractions Research
      | Email: pramsey at refractions.net
      | Phone: (250) 885-0632
      \_