STOverlaps (geography Data Type)

 

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)yesAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Returns 1 if a geography instance spatially overlaps another geography instance, or 0 if it does not.

  
.STOverlaps ( other_geography )  

other_geography
Is another geography instance to compare against the instance on which STOverlaps() is invoked.

SQL Server return type: bit

CLR return type: SqlBoolean

This method always returns null if the spatial reference IDs (SRIDs) of the geography instances do not match.

The following example uses STOverlaps() to test two geography instances for overlap.

DECLARE @g geography;  
DECLARE @h geography;  
SET @g = geography::Parse('POLYGON ((-120.533 46.566, -118.283 46.1, -122.3 47.45, -120.533 46.566))');  
SET @h = geography::Parse('CURVEPOLYGON (COMPOUNDCURVE (CIRCULARSTRING (-122.200928 47.454094, -122.810669 47.00648, -122.942505 46.687131, -121.14624 45.786679, -119.119263 46.183634), (-119.119263 46.183634, -119.273071 47.107523), CIRCULARSTRING (-119.273071 47.107523, -120.640869 47.569114, -122.200928 47.454094)))');  
SELECT @g.STOverlaps(@h);  

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