| title | STIsValid (geography Data Type) | |
|---|---|---|
| description | STIsValid (geography Data Type) | |
| author | MladjoA | |
| ms.author | mlandzic | |
| ms.date | 03/14/2017 | |
| ms.service | sql | |
| ms.subservice | t-sql | |
| ms.topic | reference | |
| ms.custom |
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| helpviewer_keywords |
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| dev_langs |
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[!INCLUDE SQL Server Azure SQL Database Azure SQL Managed Instance FabricSQLDB]
Returns true if a geography instance is well-formed and recognized as a valid geography object based on its Open Geospatial Consortium (OGC) type. Returns false if a geography instance is not well-formed. This method is precise.
This geography data type method supports FullGlobe instances or spatial instances that are larger than a hemisphere.
.STIsValid ( )
[!INCLUDEssNoVersion] return type: bit
CLR return type: SqlBoolean
The OGC type of a geography instance can be determined by invoking STGeometryType().
[!INCLUDEssNoVersion] produces only valid geography instances, but allows for the storage and retrieval of invalid instances. A valid instance representing the same point set of an invalid instance can be retrieved using the MakeValid() method.
The following example creates a geography instance and uses STIsValid() to test if the instance is valid.
DECLARE @g geography = geography::STGeomFromText('LINESTRING(0 0, 2 2, 1 0)', 4326);
SELECT @g.STIsValid();
DECLARE @g geography STGeometryType (geography Data Type)
MakeValid (geography Data Type)
OGC Methods on Geography Instances