[postgis-users] Re: truly_inside

[Juanse]

Paul

Is the distance() method too slow, i am runnig

select count(*) t0,t1 where distance(t0.wkb_geomtry, t1.wkb_geometry)= 0 and
(t0.nombre = 'Galvarino')

and it takes for ages

t0 have 31 records
t1 have 1321 records

Juanse
temuko-chile

----- Original Message -----
From: Paul Ramsey <pramsey at refractions.net>
To: Juanse <georef at tie.cl>
Cc: <postgis-users at postgis.refractions.net>
Sent: Monday, October 21, 2002 1:03 PM
Subject: [postgis-users] Re: truly_inside


> Yes and no. The full Relate() method is still under construction (but
> quite quite close).
>
> You can test overlaps/touchs indirectly though, using the Distance()
> function, which is good enough for the purpose. A Distance() = 0 implies
> that the objects either touch, overlap, or contain; ie, they share some
> part of their area.
>
> P.
>
> Juanse wrote:
> > Paul
> >
> > on january 2002 this fellow ask for the question of "a way to check
> > whether polygon A intersects/ (overlaps) with polygon B? Both polygons
> > can have arbitrary shapes.
> > /
> > you answer that it was in the To Do list
> >
http://postgis.refractions.net/pipermail/postgis-users/2002-January/000567.h
tml
> >
> >
> > Is it already implemented?
> >
> > Juanse
> > temuko-chile
> >
> >
> >
> >
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> --
>        __
>       /
>       | Paul Ramsey
>       | Refractions Research
>       | Email: pramsey at refractions.net
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