[postgis-users] Selecting polygons circled by one only polygons

[Andrea Peri]

Hi,

I have a table of polygon where every polygon can be holed.
And in the hole can be inside another polygon (another record of the table,
no multipolygons).

I need to detect all the polygon that are inside a hole of another polygon.

Initially I think this was easy but
after some test I notice this is not so easy because the polygon inside the
hole is formerly disjoint from the polygon with hole.

For more example I don't search the polygon that are full circled by more
than 1 polygon, but only the polygon circled by 1 only polygon

There is some method to detect this type of situations ?


Thx,

Andrea peri.

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Andrea Peri
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qwerty àèìòù
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