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  1. #1
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    Default How to extract POIs from ".gmp file from City Navigator Europe NT 2013.30.gmap

    Hi together
    I have bought City Navigator Europe NT 2013.30.gmap from Garmin. How can I extract the files from the *.gmp data, especially the poi's?
    Many thanks for your help!
    Peter

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  3. #2
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    Welcome on Noeman Forum

    I do not think you can do to pull POIs on the map from the map itself.

    Even if one could ... on which of the 477 (NT and NTU) that make up the same map?

    Example:first folder 00417038 with files I10FD95C.GMP

    Example Data file from NT(U):
    Code:
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    Last edited by Roger; 7th December 2012 at 21:19.

  4. #3
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    Thanks for your answer. I have also downloaded POIs from OSM. But they are not as well structured as the ones from a navi. Is there any other possibility to get POIs (TOMTOM and so on) that I can use in qGIS or ArcGIS?
    Peter

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    Ah,ok....your correct section is [Only registered and activated users can see links. ]
    In the correct section you can find some more help

    For Quantum GIS [Only registered and activated users can see links. ]

    For ArcGIS [Only registered and activated users can see links. ] (but link dead...sorry)

    Bye,bye

  6. #5
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    Quote Originally Posted by Bodenmann View Post
    I have bought City Navigator Europe NT 2013.30.gmap from Garmin. How can I extract the files from the *.gmp data, especially the poi's?
    No way for Garmin now! Cause is in the letters "NT". There are not editors or decompiler for this Garmin format.
    Love your wife? Buy yourself a GPS for answering to her favorite question: "Dear, where are you?".

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    The only way to do that is to do some reverse engineering on the only two (as far I know) programs that can read Nt format: Garmin Mobile XT and Mapsource (and its derivatives: training center and so on)...so, we need some magic here

    Several days ago I have read in another blog that the nt format is just scrambled by a simply xor function, that is because it cannot be decrypted, yet?

    Note by MOD: use button Edit post for join Info in your latest post.Tnx
    Last edited by Roger; 15th February 2013 at 10:22. Reason: merged post

  8. #7
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    Quote Originally Posted by novoment View Post
    Several days ago I have read in another blog that the nt format is just scrambled by a simply xor function, that is because it cannot be decrypted, yet?
    If it were that simple, everyone would already be able to do that. But no, NT is somewhat more complicated. Speaking in general terms, older IMG sections are packed inside the new GMP section, and a few new datatypes are added to the older sections.
    Also a few people have definitely reverse engineered it, but they don't release the results of their efforts. And I can't blame them for that
    And also the tiny bits of info above is not my personal research, I'm just retelling the words of one man "in the know".

  9. #8
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    Think the most important question here is why would one need that? In general the weakest part of the Navteq mapping is its POIs. You can find many free sources with better data. Even Garmin in the latest models are hiding purposly the POIs from CNE.

  10. #9
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    Quote Originally Posted by novoment View Post
    Several days ago I have read in another blog that the nt format is just scrambled by a simply xor function, that is because it cannot be decrypted, yet?
    Read this blog and you know that a some resource is packed for smaller size of data. I do not hear about xor function for packing...
    Love your wife? Buy yourself a GPS for answering to her favorite question: "Dear, where are you?".

  11. #10
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    If it was just xored it could be so simple lol
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