[mkgmap-dev] Overview map for Africa

Tue Mar 26 11:47:30 GMT 2013

Hi Felix,

I don't understand what problem you see with "all that low resolutions":
I created the overview map with those tiles that were produced with the
default
style. 

Gerd

Felix Hartmann-2 wrote
> BTW: here is the old thread about the overview map branch:
> http://www.mkgmap.org.uk/pipermail/mkgmap-dev/2010q3/008700.html
> 
> 
> And there is clearly a second huge problem. The branch only used the 
> created .img files in order to make a new overview map. However that 
> defeats it's purpose.
> The resulting overview map is used, and yes, it probably (though I'm not 
> even sure about it) speeds up Mapsource/Basecamp/Qlandkarte GT when 
> zoomed out, but the main problem remains. With all that low resolutions 
> in the actual normal .img files, there is no speedup for the GPS device, 
> where those low resolutions are a PITA.
> So there needs to be a clear separation of overview map, vs normal map 
> in the resolution levels.
> 
> Also it would be great, if for subsequent mkgmap runs with different 
> input data, the overview map data could be reused, and simply tiles 
> added without adding information. (e.g. you create one map, and want to 
> have it a) including contourlines b)without contourlines - so you need 
> to separate overview maps, one referencing the contourlines .img files, 
> one not referencing them. At the same time the map data of both overview 
> maps, should be the same of course and it would be a waste of time 
> running mkgmap twice just because now the overview map is not created 
> from the standard *.img files anymore).
> 
> On 26.03.2013 10:56, GerdP wrote:
>> Minko-2 wrote
>>> If I look at your overviewmap the coastline seems still very detailed.
>>> How many tiles is this overview map (just one?).
>>> Is it possible to use another shape for the continent(s) or maybe a
>>> filtered
>>> osm coastline that throws away all the small details like islands and
>>> stuff?
>>>
>>> Is it possible to update this branch version so we can experiment a bit
>>> with the overview map?
>> It is one tile with < 5 Mb.
>> The branch is r1666 and t1659 was merged with trunk, so I can try to
>> merge
>> current trunk with the old code, but first I'd like to know why
>> development
>> was stopped.
>>
>> Gerd
>>   
>>
>>
>>
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> -- 
> keep on biking and discovering new trails
> 
> Felix
> openmtbmap.org & www.velomap.org
> 
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