[mkgmap-dev] Empty Areas in US West (Area too small to split)?

Thu May 5 22:50:35 BST 2011

Hi WanMil,

thanks for the pointers. Question is then:
1) How can I create an incentive for you to continue? ;-) (Any estimates?)
2) Do you know any workaround?

Dominik

On 05.05.2011, at 20:33, WanMil wrote:

> Dominik,
> 
> I think this is a known problem of mkgmap.
> 
> The problem is that the algorithm that divides the map into subdivisions 
> has to consider several restrictions. The current algorithm is not very 
> optimal to solve these restrictions.
> I started working on this but didn't finish up to now 
> (http://www.mkgmap.org.uk/pipermail/mkgmap-dev/2011q1/009960.html).
> 
> WanMil
> 
>> Hi,
>> 
>> when I take the geofabrik US West extract, run it through splitter and then try to run mkgmap on it, I get errors on a couple of areas [1]. I tried reducing the max-nodes parameter for the splitter from 1000000 to 750000, that didn't help. The problem in this case seems to be not too many nodes, but rather *too few*.
>> 
>> When I try loading those mentioned areas into JOSM, I get an error message: "No data found for this area."
>> 
>> Mkgmap doesn't seem to handle this well. The map generation process stalls without any further error message. Could this be fixed?
>> I can provide the original us-west.osm.pbf on request.
>> 
>> Regards,
>> 
>> Dominik
>> 
>> [1] Log Output:
>> 
>> SEVERE (MapSplitter): ../63240355.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=38.93716&mlon=-121.78252&zoom=17 (reduce the density of points, length of lines, etc.)
>> SEVERE (MapSplitter): ../63240355.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=38.93716&mlon=-121.78252&zoom=17 (reduce the density of points, length of lines, etc.)
>> SEVERE (MapSplitter): ../63240363.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=35.72533&mlon=-120.98516&zoom=17 (reduce the density of points, length of lines, etc.)
>> SEVERE (MapSplitter): ../63240363.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=35.72533&mlon=-120.98516&zoom=17 (reduce the density of points, length of lines, etc.)
>> SEVERE (MapSplitter): ../63240358.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=34.96583&mlon=-111.85854&zoom=17 (reduce the density of points, length of lines, etc.)
>> SEVERE (MapSplitter): ../63240358.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=34.96583&mlon=-111.85854&zoom=17 (reduce the density of points, length of lines, etc.)
>> SEVERE (MapSplitter): ../63240358.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=34.96583&mlon=-111.85854&zoom=17 (reduce the density of points, length of lines, etc.)
>> SEVERE (MapSplitter): ../63240358.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=34.96583&mlon=-111.85854&zoom=17 (reduce the density of points, length of lines, etc.)
>> SEVERE (MapSplitter): ../63240358.osm.gz: Area too small to split at http://www.openstreetmap.org/?mlat=34.96583&mlon=-111.85854&zoom=17 (reduce the density of points, length of lines, etc.)
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>> 
> 
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