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<div class="Normal"><span style='font-size: 10pt;'>I try to create the exterior
boundary of all polygons of the attached postgis polygon table
with:</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>select
geomunion(wkb_geometry) from test;</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>As the result I don't get the
expected result. Only parts of the input polygons are dissolved. The culprit
seems to be the polygon with gid=1. This polygon is very complex with many
vertex points. All geometries are valid, checked by isValid(wkb_geometry).
Please use the attached geometry table to reproduce this behaviour.</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>My System:</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>PostgreSQL 8.1.6 on
i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.4.4 20050721 (Red Hat
3.4.4-2)</span><br><span style='font-size: 10pt;'>POSTGIS="1.1.5"
GEOS="3.0.0rc1-CAPI-1.2.0" PROJ="Rel. 4.4.8, 3 May 2004" USE_STATS</span></div>
<div class="Normal"><br><br></div>
<div class="Normal"><span style='font-size: 10pt;'>I would appreciate any
hint.</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>Best
regards</span><br><span style='font-size: 10pt;'>Horst</span></div>
<div class="Normal"><br><br></div>
<div class="Normal"><span style='font-size: 10pt;'>------------------------------------------------</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>Dr. Horst
Düster</span><br><span style='font-size: 10pt;'>GIS-Koordinator, Stv.
Amtschef</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>Kanton
Solothurn</span><br><span style='font-size: 10pt;'>Bau- und
Justizdepartement</span><br><span style='font-size: 10pt;'>Amt für
Geoinformation</span><br><span style='font-size: 10pt;'>SO!GIS
Koordination</span><br><span style='font-size: 10pt;'>Rötistrasse
4</span><br><span style='font-size: 10pt;'>CH-4501 Solothurn</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>Telefon ++41(0)32 627 25
32</span><br><span style='font-size: 10pt;'>Telefax ++41(0)32 627 22
14</span></div>
<div class="Normal"><br></div>
<div class="Normal"><span style='font-size: 10pt;'>mailto:horst.duester@bd.so.ch</span><br><span style='font-size: 10pt;'>http://www.agi.so.ch</span>
</div>
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