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[mkgmap-dev] Splitting an country borders?

From Apollinaris Schoell aschoell at gmail.com on Wed Sep 16 08:29:42 BST 2009

mkgmap can create routable maps across tiles. This requires splitting  
on defined grids and is done with the splitter automatically
It is not possible to stitch data from multiple Coudmade/Geofabrik  
downloads. They are broken at the boundary and this information is lost.
For a world map split the whole planet with splitter and run it  
through mkgmap with option route. I had to lower max-nodes for  
splitter to 850000 for north America. some tiles in canada have a  
different node-way ratio and splitter still uses only node count to  
make the split decision. not perfect but still pretty large tiles.
routing across tiles is not perfect and as efficient as on original  
Garmin maps. But it works pretty well already.

On 16 Sep 2009, at 24:09 , Carsten Schwede wrote:

> Hi,
> Ralf Kleineisel schrieb:
>> - Make one Garmin map with mkgmap + splitter so you can route  
>> between all tiles
> What need mkgmap special to enable routing between tiles? I would like
> to use this special also in the cutting program I use for creating a
> completely routable worlmap...
> -- 
> Viele Gruesse
> Computerteddy
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> mkgmap-dev at lists.mkgmap.org.uk
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