[postgis-users] split donut polygons

[Nicklas Avén]

Hallo

If I understand that "DonutBridgeBuilder" picture right, what it does is
making corridors to make all interior rings being part of the outer
ring. That seems like a very bad idea and will most likely result in
invalid geometries in many cases. Invalid because they are self
intersecting.
What is the error message you get? 

If you cannot make the application handle holes in polygons I would
suggest putting the holes in a layer above the main polygon instead. You
will get a problem if you need to see what is behind the donut polygon
through the holes, but then I think you will have to deal with the
source to the problems. The application not handling holes.

Regards

Nicklas




. On Wed, 2012-02-15 at 09:07 -0500, Travis Kirstine wrote:
> Hi all,
> 
> I have a application that cannot render donut in polygons (renders the
> outer ring only).  As a result I need to "remove" the interior rings
> by creating a connection between the donut and the exterior ring.  FME
> has a tool called "DonutBridgeBuilder" that will do this however I am
> having issues with the postgis reader / writer
> 
> example:
> http://evangelism.safe.com/wp-content/uploads/2008/06/donutbuilder.jpg
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