...
Information about the offset and scale can be determined using GeoTIFF tags. The following is the meta information stored in the TIFF image, displayed with the tool jhove.
jhove.bat wms.tiff
This will report the following GeoTIFF properties:
GeoTIFFProperties:
ModelTiepointTag: -3.369999885559082, -6.0, 0.0, 0.0, 0.0, 0.0
ModelPixelScaleTag: 0.06125489994883537, 0.09243137389421463, 0.0
The ModelTiepointTag stores the offsets for the u and v values. Only the first two values are relevant. In this case the UOffset = -3.369999885559082 and the VOffset = -6.0.
...