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[mkgmap-dev] splitter, mapid

From brad bradhaack at fastmail.com on Mon Dec 17 16:59:25 GMT 2018

I'd be happy to take a stab at updating some docs.    It looks like the 
docs are the same on mkgmap.org and wiki.openstreetmap.org. Do the 
changes on mkgmap.org flow to OSM, or the other way? Should I post 
updates here?


On 12/16/18 11:57 PM, Gerd Petermann wrote:
> Hi all,
> I've never tried it, but my understanding was that you can have the same tile (mapid) in two different gmapsupp files.
> E.g. you might create a tile containing an area around Hamburg and put that tile into a gmapsupp for Germany as well as another
> one for Lower Saxony.
> If that is right it would explain why you have to make sure that the content of two tiles with the same id doesn't differ.
> @Brad: I think the current documentation about the meaning of all those names and ids is not perfect because the authors of mkgmap
> were still learning when the docu was created, and it's an ongoing process ;-)
> Feel free to improve the docu (post a patch or maybe a new version of one or more files).
> Gerd
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von brad <bradhaack at fastmail.com>
> Gesendet: Montag, 17. Dezember 2018 01:47
> An: mkgmap-dev at lists.mkgmap.org.uk
> Betreff: [mkgmap-dev] splitter, mapid
> One thing I think I missed, is that each tile on a garmin device needs a
> unique mapid.   A different family-id and mapname for each gmap is not
> sufficient.   Does this sound correct?
> I'd been downloading US states from Geofabrik, creating maps with unique
> family-id, mapname, every name & id that seemed important, (with
> mkgmap)  but when I put them on the Garmin they all wouldn't show up.
> Only when I went back to the splitter step & used a different mapid did
> they all show up.
> Sometimes I'm not too good at reading directions,  did I overlook this
> someplace?
> Brad
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