Code to read locked maps
Hi all, The source code [1] for GPXSee [2] contains a routine demangle() which "unlocks" a locked TRE file. I was aware that there are tools which can do that but never saw open source so far. It's easy to add this in TREFileReader. I've already patches for mkgmap and display tool which allow to read e.g. Adria Topo with e.g. RgnDisplay or NetDisplay. Newer maps with Huffman encoded labels (in GMP file) do not yet work, I only managed to extract some labels from LBL so far. I don't plan to add support in mkgmap to write locked maps, but maybe mkgmap will be able to write NT maps sometimes. Gerd [1] https://github.com/tumic0/GPXSee/blob/master/src/map/IMG/trefile.cpp [2] https://www.gpxsee.org/
Hi,
The source code [1] for GPXSee [2] contains a routine demangle() which "unlocks" a locked TRE file. I was aware that there are tools which can do that but never saw open source so far.
The unlock code is on GitHub since 2012 (that's four years before the GPXSee project has even started). You can create your own locked maps using non-Garmin software since 2008. M.
That sounds promising, great!! Le 26/1/22 à 13:01, Gerd Petermann a écrit :
Hi all,
The source code [1] for GPXSee [2] contains a routine demangle() which "unlocks" a locked TRE file. I was aware that there are tools which can do that but never saw open source so far. It's easy to add this in TREFileReader. I've already patches for mkgmap and display tool which allow to read e.g. Adria Topo with e.g. RgnDisplay or NetDisplay. Newer maps with Huffman encoded labels (in GMP file) do not yet work, I only managed to extract some labels from LBL so far.
I don't plan to add support in mkgmap to write locked maps, but maybe mkgmap will be able to write NT maps sometimes.
Gerd
[1] https://github.com/tumic0/GPXSee/blob/master/src/map/IMG/trefile.cpp [2] https://www.gpxsee.org/ _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Hi Gerd I agree with Carlos: It would be quite an achievement to create NT imgs. I looked at the POI structure once to unravel the extra types Garmin uses in its city navigation maps and they looked less daunting than highways & polygons . btw I have a hunch that mapsources' cache can reveal types and more perhaps Good Luck Nick On 27/01/2022 09:16, Carlos Dávila wrote:
That sounds promising, great!!
Le 26/1/22 à 13:01, Gerd Petermann a écrit :
Hi all,
The source code [1] for GPXSee [2] contains a routine demangle() which "unlocks" a locked TRE file. I was aware that there are tools which can do that but never saw open source so far. It's easy to add this in TREFileReader. I've already patches for mkgmap and display tool which allow to read e.g. Adria Topo with e.g. RgnDisplay or NetDisplay. Newer maps with Huffman encoded labels (in GMP file) do not yet work, I only managed to extract some labels from LBL so far.
I don't plan to add support in mkgmap to write locked maps, but maybe mkgmap will be able to write NT maps sometimes.
Gerd
[1] https://github.com/tumic0/GPXSee/blob/master/src/map/IMG/trefile.cpp [2] https://www.gpxsee.org/ _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
participants (4)
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Carlos Dávila -
Gerd Petermann -
Martin Tůma -
osm