[postgis-users] Problem importing SHP polygons

[Conrad Bielski]

Hi,I'm having a curious issue importing a polygon SHP file into PostGIS. I'll describe the procedure that I'm using and the problem that I'm having and hopefully somebody has had this issue in the past and fixed it.
So the procedure is that I use GRASS to produce a vector from a raster output: (r.to.vect input=MASK output=vecMap feature=area)  and then export to SHP file (v.out.ogr -c -e input=vecMap dsn=fname format=ESRI_Shapefile type=area).
Now when this SHP file is imported into PostGIS, the type is changed to multistring for some reason. Then when checking the topology, there is a 'ring self-intersection' error. This PostGIS db is then imported into GeoServer, where lines are connecting between different parts of the largest polygon (this should not be happening). If I fix this typology problem, then the largest polygon in the db disappears.
The strange thing is the following:1. Opening the SHP file in QGIS doesn't have this problem2. Importing the SHP file directly into GeoServer, doesn't generate this problem either.
Why is PostGIS having an issue importing this file?
Any ideas how to fix this?
Thanks in advance for your help,Conrad


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