[postgis-users] ERROR: distance returned negative!

Paul Ramsey pramsey at cleverelephant.ca
Fri May 1 13:26:33 PDT 2020

> On May 1, 2020, at 1:19 PM, Christophe Pettus <xof at thebuild.com> wrote:
>> On May 1, 2020, at 12:09, Christophe Pettus <xof at thebuild.com> wrote:
>>> On Apr 30, 2020, at 18:43, Paul Ramsey <pramsey at cleverelephant.ca> wrote:
>>> Yes, there's some magic geometry in there... if you can get it down to the offending pair, that would be amazing amazing
>> I'll see if I can!  Is that error caught by an EXCEPTION block in PL/pgSQL?  There are a *lot* of geometries, and I'll have to iterate through them.
> And before I go spelunking here, is it known that an ST_Distance that includes a self-intersecting LINESTRING in either or both parameters could case this?

Honestly, this is very rare, as in I haven't seen it before...


> --
> -- Christophe Pettus
>   xof at thebuild.com
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