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[overpass] QL Intersections


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  • From: Malcolm Herring <malcolm.herring@btinternet.com>
  • To: overpass@osm101.openstreetmap.fr
  • Subject: [overpass] QL Intersections
  • Date: Thu, 17 Dec 2015 11:50:09 +0000

I need to perform an intersection, but there appears to be no native operator for this. So I am attempting to do this with unions & differences.

What I require: rel['key1'='value1'] AND rel['key2'='value2']

If I write: (rel['key1'='value1'] - rel['key2'!='value2'])

Will this work even if a relation in the input set has no tag with 'key2'? I cannot find a definition of the "!=" operator.




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