STOverlaps (geography Data Type)

**APPLIES TO:** SQL Server (starting with 2008) Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse

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

Syntax

  
.STOverlaps ( other_geography )  

Arguments

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

Return Types

SQL Server return type: bit

CLR return type: SqlBoolean

Remarks

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

Examples

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);