[postgis-users] Problems with st_difference

[Marko Čubranić]

---------- Forwarded message ----------
From: Marko Čubranić <mcubranic at gmail.com>
Date: 2010/1/23
Subject: Re: [postgis-users] PROBLEM CONVERTING AND MANIPULATING LONGITUDE
ANDLATITUDE COORDINATES
To: PostGIS Users Discussion <postgis-users at postgis.refractions.net>


Dear colleagues,

i have problems with ST_difference operator.
I have imported two *.shp files in postgis databas, country(polygon) and
region of country(polygon).
I have run ST_difference query and the result was as i  expected, but
result was also part of
both polygons, more precise some of boundary lines that both polygons
contains.
I have checked geometries in AutoCAD and both geometries are similar, line
on line, point on point.
Than I run queries in postgis to show me Geometry as text of both polygons
and result of ST-difference. And all geometries contained same coordinates.

I hope that you have understand my problem and thank you for your help.

Marko
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