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Nullable (boxed) ImGearEXIFGPSDifferential enumeration value.This property accesses the GPSDifferential tag. The tag indicates whether differential correction is applied to the GPS receiver.
Get accessor returns the tag value if the tag is present in the metadata tree, or null otherwise.
Set accessor replaces the current tag value if the tag is present in the metadata tree, adds the tag if it was not present, or deletes the tag if a null value is passed.
See the EXIF 2.2 specification for tag usage details.