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

Hi r0cker!

This is good!!!

I get some differences in offsets with "my manual" conversion in comparison to yours. Some i believe are because you delete some copyright info from the headers (i need to look this further).
But also for example in LBL header i think there is a problem with bthe offsets in the extraction.
Take a look at example2.rar file attached to [Only registered and activated users can see links. ]
In LBL at xb0 (4bytes) it indicates the beginning of the LBL "body", so as the LBL header is 236 bytes long in xb0 should have xec which is the offset inmediatly after the header ends.

With your conversion i get in xb0 the offset xd1 which point somewhere inside the header, and not at the beginning of he body

ps: Just an idea: Instead of naming garmin.XXX to the gmp's sub structures, it would be useful if you can call them as the original gmp file.
ie: examplemap.gmp >> examplemap.LBL; examplemap.RGN; etc...

thanks

I corrected the small glitch in lbl offset calculation and renamed the filenames to be the same as the gmp

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Regards, R0cker

Thanks for accepting the naming idea!

More feedback:

*LBL; NET; NOD are OK!

*In RGN you forget to adjust the offset at x55
in the example it says x52f it should go x208, as you correctly did in the other offsets in RGN, the rest is OK.

*TRE is OK also, there are differences because you change the copyright info for a custom one, but all offsets point to where they should, so NO problem.
Another idea: perhaps you could put there your name and version, instead of garbage, like: r0cker V2.00 or something...or the option to keep the original copyright info (this probably would need more programming as copyright info change between map compilers, like mapear or carteblanche)

thanks

Hi, i've fixed the rgn. could you check it again?

Germain

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Checked.

Excellent!!! working perfect.

Tested with a real pseudo-nt map from mapear.
1-Using your extractor version 3,
2-then joining the files with GMapTool as a non-nt img (short header in options),
3-then opening it with GPSMapEdit and saving as a *.mp format without any problem or error.
all working perfect.
same result as the "manual extraction", EXACTLY the same output as a *.mp map in both cases.