STGeomCollFromText (geography Data Type)
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Returns a geography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation, augmented with any Z (elevation) and M (measure) values carried by the instance.
Syntax
STGeomCollFromText ( 'geometrycollection_tagged_text' , SRID )
Arguments
geometrycollection_tagged_text
Is the WKT representation of the geography instance you wish to return. geometrycollection_tagged_text is an nvarchar(max) expression.
SRID
Is an int expression representing the spatial reference ID (SRID) of the geography instance you wish to return.
Return Types
SQL Server return type: geography
CLR return type: SqlGeography
Remarks
The OGC type of the geography instance returned by STGeomCollFromText() is set to the corresponding WKT input.
This method throws an ArgumentException if the input is not valid.
Examples
The following example uses STGeomCollFromText() to create a geography instance.
DECLARE @g geography;
DECLARE @g geography;
SET @g = geography::STGeomCollFromText('GEOMETRYCOLLECTION ( POINT(-122.34900 47.65100), LINESTRING(-122.360 47.656, -122.343 47.656) )', 4326);
SELECT @g.ToString();