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

Originally Posted by Giomen

What about it?

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
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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!

Originally Posted by Giomen

I do not write what it is saucer with blue border! But source code is very useful things sometime. We had big provocative discussion about non-NT and NT format on russian forum. Do the bible by John Mechalas have another analogue?

Originally Posted by catymag

It could be nice to hear
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opinion about this matter

I also need that Wu Yongheng explain us what he means. I didn't understand what he said.
From what i see, gimgtools doesn't help us.
In [Only registered and activated users can see links. ]
He says:
"...Credits:
Most of the reverse engineering on IMG format was done by other pepole (listed
below). I just read their docs and code. The reverse engineering of the
unlocking algorithm and the GMP section (aka the NT format by Garmin) are my
work...."

But i don't see where in his utilities he reverse engineered the pdeuso-NT format, or even more, where, he reverse engineered the NT format as he is claiming.
It would be nice he accomplished that, it would be nice Wu Yongheng explain us.