Thread: Convert garmin .img pseudo-NT to non-NT? I know it's possible, but how?(SOLVED!!!)

Originally Posted by Kanopus

Internal structure of Garmin NT format is not known.

What about it?

Spoiler: CLICK

Other than that, I have done some research on the deviation of China map
coordinates. Though there is no concrete result, you can follow it in this
article
[Only registered and activated users can see links. ]
My ultimate goal is to change the coordinates in place, i.e. change individual
bytes without recompiling the map. The cmdc tool is to generate the deviation
table. The gimgfixcmd tool fixes the deviation of a map.

...

The reverse engineering of the unlocking algorithm and the GMP section (aka the NT format by Garmin) are my work.

It is really work!