[mkgmap-dev] Code to read locked maps

Thu Jan 27 10:24:10 GMT 2022

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/
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