[OSM-dev] invalid geometry in planet_polygon

Mike N. niceman at att.net
Tue Aug 24 12:17:07 BST 2010

> ST_IsValid is a relatively expensive operation, so be careful with that. 
> If you are using it a lot, it might be worthfile to just delete invalid 
> geometries once.

  I've measured the speed difference at about 8X to use ST_IsValid .

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