[mkgmap-dev] Marko is maintaining the mkgmap default style file

Mon Dec 7 10:55:26 GMT 2009


On 07.12.2009 11:28, Marko Mäkelä wrote:
> Hi Felix,
>
>    
>> You should tryout the default style drawing speed in Germany or the
>> Netherlands - other places detail level will sometimes catch up, and so
>> to say - less is more. I a country is 100% street and waymapped, then
>> the current style is far too overloaded in low resolutions.
>>      
The worst is not the layout itself (the highway exits are the best 
example), but the time it takes to render with for me no visible 
advantage. Overload is really bad. Rendering Europe as a whole and 
looking at West Germany/BeNeLux area you will directly understand. I had 
posted a patch a few days ago on the list for better routing - have a 
look at it and imlement the resolution changes - and maybe some others. 
Without duplicating the roads (as without typfile this will slow down 
the map, with typfile one could achieve no slowdown via invisible lines, 
as invisible line need no time for map drawing).
> Can you post a couple of sample pics of what you find overloaded and
> what it should look like?  Drawing the map of Helsinki area is taking
> several seconds at low resolutions, and I agree that the minimum
> resolutions of some map features could be bumped up a little.
>
> My area (25 km north from Helsinki) has almost full coverage of the public
> road network.  Only some cycleways, paths, driveways and alleys are missing,
> and I have been adding those.  Helsinki is very well mapped: you can easily
> run out of memory in JOSM. :-)
>
> I see that http://download.geofabrik.de/osm/europe/germany/ has per-state
> planet extracts.  Do you think that Hamburg or Schleswig-Holstein would
> serve as good examples?  Or perhaps Berlin?  Those are the areas of Germany
> that I am most familiar with.
>    
No you will only really grasp the problems when you render a big area. 
If you have problems with Memory limitations try Nordrhein-Westfalen, 
this is probably the most densely mapped larger area worldwide. 
Scandinavian countries are in general not so dense in information - due 
to low population per area.
> 	Marko
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