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ST_AsBinary/ST_AsWKB

ST_AsBinary/ST_AsWKB
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Name

ST_AsBinary/ST_AsWKB — Return the Well-Known Binary (WKB) representation of the raster.

Synopsis

bytea ST_AsBinary ( raster rast , boolean outasin=FALSE ) ;

bytea ST_AsWKB ( raster rast , boolean outasin=FALSE ) ;

Description

Returns the Binary representation of the raster. If outasin is TRUE, out-db bands are treated as in-db. Refer to raster/doc/RFC2-WellKnownBinaryFormat located in the PostGIS source folder for details of the representation.

This is useful in binary cursors to pull data out of the database without converting it to a string representation.

[Note]

By default, WKB output contains the external file path for out-db bands. If the client does not have access to the raster file underlying an out-db band, set outasin to TRUE.

Enhanced: 2.1.0 Addition of outasin

Enhanced: 2.5.0 Addition of ST_AsWKB

Examples 

SELECT ST_AsBinary(rast) As rastbin FROM dummy_rast WHERE rid=1;

					 rastbin
---------------------------------------------------------------------------------
\001\000\000\000\000\000\000\000\000\000\000\000@\000\000\000\000\000\000\010@\000\000\000\000\000\000\340?\000\000\000\000\000\000\340?\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\012\000\000\000\012\000\024\000

See Also

ST_RastFromWKB , ST_AsHexWKB

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