[postgis-users] MultiPolygon -> Polygon

[James Sewell]

 Hi all,

I have a set of LineStrings which are being turned in Polygons (most of
which are invalid).

I can clean these (makevalid or buffer), but then some of them result in
MultiPolygons (which makes sense - mostly small bowties).

I'm looking for the easiest way to get a single Polygon from each of these
MultiPolygons - I can tolerate a small amount of change in area (up to 5%).

I've tried small just keeping the largest poly, buffer(small_number) and
concavehull but nothing seems quite right.

Any ideas?

Cheers,

James Sewell,

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