[mkgmap-dev] Routing

Tue Jul 13 18:15:41 BST 2010

Mikey,

this is a long outstanding problem of mkgmap. We don't know the exact 
file format of the garmin maps. Some parts of this format have been 
reverse engineered but the address search is not yet working reliably. 
We need some ideas what mkgmap is doing wrong here, so if you are 
interested in reverse engineering of an unknown file format have fun and 
start now :-)

mkgmap developers decided to disable address search by default unless it 
is working reliably. I don't know if it is possible to generate an 
gmapsupp.img containing address search. But you can add the --index 
parameter to mkgmap so that the relevant .MDR and .MDX files are 
generated. These files can be used by MapSource's address search.

To anyone: Please correct me if I am wrong :-)

Have fun!
WanMil

> I can build routable maps for my Garmin.  However, I can search for any
> street names.
>
> ie:  I can navigate to an intersection and say "go-to" no problem.  But
> clicking on the find ->  address.  Nothing comes up.   I'm trying to
> determine if this is a problem with mkgmap or the source OSM data.
>
> Can mkgmap handle the searching of names?   and if so what data is
> required on the OSM side to make it work?
>
> Mikey
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