Re: BUG #4967: polygon @> point incorrect for points close to shared borders

Paul Matthews <plm(at)netspace(dot)net(dot)au> writes:
>> How close is "close"? There's some pretty arbitrary fuzzy-comparisons
>> logic in the geometric datatypes ... see FPeq() and friends. That might
>> be doing it to you.

> I'll try to figure out how "relatively" close tonight, this stuff is
> sub-metre resolution GPS data. The attached picture shows the two
> polygons, the shared border, a road in this case, and the houses that
> think they are on both sides of the road. Houses and other features are
> located with latitude+longitude.<br>

Hmm ... just out of curiosity, why aren't you using PostGIS for this?
Our built-in geometric types are mostly an academic proof-of-concept,
they aren't industrial strength IMHO.

regards, tom lane