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Also consider inverted direct datum transformations
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src/core/qgscoordinatetransform.cpp

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@@ -792,6 +792,8 @@ QList< QList< int > > QgsCoordinateTransform::datumTransformations( const QgsCoo
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QList<int> directTransforms;
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searchDatumTransform( QString( "SELECT coord_op_code FROM tbl_datum_transform WHERE source_crs_code = %1 AND target_crs_code = %2" ).arg( srcAuthCode ).arg( destAuthCode ),
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directTransforms );
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searchDatumTransform( QString( "SELECT coord_op_code FROM tbl_datum_transform WHERE source_crs_code = %1 AND target_crs_code = %2" ).arg( destAuthCode ).arg( srcAuthCode ),
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directTransforms );
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QList<int> srcToWgs84;
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searchDatumTransform( QString( "SELECT coord_op_code FROM tbl_datum_transform WHERE ( source_crs_code = %1 AND target_crs_code = %2 ) OR ( source_crs_code = %2 AND target_crs_code = %1 )" ).arg( srcAuthCode ).arg( 4326 ),
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srcToWgs84 );

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