[Qgis-user] Island polygon

[Ralf Suhr]

Hi Intengu Technologies,

you have to build the geomunion of the six inner polygons. Take the inner 
geomunion and substrakt this from the outer polygon. This will produce a 
hole, what the main problem of the dataset is.
I think the shapefile was build with simple polygons. You need a dataset with 
multipolygons.

Regards

Ralf
Am Mittwoch 02 Juli 2008 schrieb Intengu Technologies:
> How do I clean island polygons - I have imported this shapefile (v.ogr) as
> a grass vector layer and ran the v.clean command.  Instead of having 7
> records I have 13 records - the reason is that each island polygon also
> takes the records of the outer polygon.  How can I solve this.