|Private TIFF Tag GPS IFD|
TIFF Tag Reference
TIFF Tag GPS IFD
A pointer to the Exif-related GPS Info IFD.
GPS IFD is a set of tags for recording GPS information. It is pointed to by the offset from the TIFF header (Value Offset) indicated by a GPS private tag value.
The Interoperability structure of the GPS Info IFD, like that of Exif IFD, has no image data.