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  1. #11
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    Perhaps it has a bug when left or right are undefined (none).
    I'll check.
    But the roads numbers i checked, all are okay, but they have both sides defined left and right numbering.
    example: Numbers1=1,E,100,200,O,101,199
    Last edited by testlelelala; 6th August 2013 at 09:34.

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  3. #12
    Navigation software expert Kanopus's Avatar
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    Try: Numbers1=2,E,100,200,O,101,199

    I really hope that old cgpsmapper is not good enough to kick out of business 3-rd party map publishers like CarteBlanche.
    Thanks, Kanopus

  4. #13
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    hi! can you make these with NT-source (not pseudo) ?

    thanks!

  5. #14
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    Quote Originally Posted by Kanopus View Post
    Try: Numbers1=2,E,100,200,O,101,199

    I really hope that old cgpsmapper is not good enough to kick out of business 3-rd party map publishers like CarteBlanche.
    I also hope that no one get kicked out of business.
    But i do hope that old cgpsmapper do things right (as it seems to be for the moment.)

  6. #15
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    Quote Originally Posted by vlasvlasvlas View Post
    hi! can you make these with NT-source (not pseudo) ?

    thanks!
    I don't know but apparently the info in real NT is encrypted or compresed or something, so probably NO, sorry.
    In this pseudo-NT case info is only in different order, but remains exactly the same. (and i put emphasis in EXACTLY)
    Last edited by testlelelala; 6th August 2013 at 20:31.

  7. #16
    Navigation software expert Kanopus's Avatar
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    Internal structure of Garmin NT format is not known. This thread is not about revers engineering Garmin NT maps but about disassembling maps from independent publishers, who use cgpsmapper.
    Thanks, Kanopus

  8. #17
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    I don't really believe that people who reverse engineered non-NT IMG files can't do the same with NT IMG files There should be some other reasons... Like all of them being involved in some economic relations which make decompiling NT maps by others not desirable
    Last edited by kunix; 6th August 2013 at 22:42.

  9. #18
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    Quote Originally Posted by Kanopus View Post
    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!
    Love your wife? Buy yourself a GPS for answering to her favorite question: "Dear, where are you?".

  10. #19
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    gimgtools is a very nice set of utilities. But they still don't help us convert NT maps to polish map format, while we can do this for non-NT maps using some utilities (gpsmapedit, for example). Also I don't see how to convert NT map to non-NT one using gimgtools.
    In conclusion, gimgtools still doesn't help us decompile NT maps, even partially.
    Last edited by kunix; 7th August 2013 at 10:19.

  11. #20
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    Quote Originally Posted by kunix View Post
    gimgtools still doesn't help us decompile NT maps, even partially.
    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?
    Love your wife? Buy yourself a GPS for answering to her favorite question: "Dear, where are you?".

 

 
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