[mkgmap-dev] Bug report --remove-short-arcs=5 ???

Tue Feb 23 15:23:40 GMT 2010

Mark Burton wrote:
>> If you zoom in I think the contours and provincial boundaries will show 
>> up, but at full zoom nothing shows because the national boundaries are 
>> missing. I am not sure exactly when they should show in mapsource, but 
>> gpsmapedit tells me they are not in the img file at all.
>>     
>
> OK, I think what's happening here is that the file contains a lot of
> points that are so close together that the remove-short-arc process
> just throws them away and then throws the ways away because they
> contain less than 2 points. If you look at the diagnostics you get lots
> of lines like:
>
> 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm:   Way 200 (http://www.openstreetmap.org/browse/way/-2475) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78333&mlon=103.63197&zoom=17) - merging node -187534 into -187526
> 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm:   Way 200 (http://www.openstreetmap.org/browse/way/-2478) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78236&mlon=103.65167&zoom=17) - merging node -187581 into -187573
> 2010/02/23 14:49:04 INFO (Osm5XmlHandler): cambodia.osm:   Way 700 (http://www.openstreetmap.org/browse/way/-2477) has consecutive nodes with the same coordinates (http://www.openstreetmap.org/?mlat=11.78327&mlon=103.34835&zoom=17) - merging node -187572 into -187564
>
> and then later you get:
>
> 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm:   Way 100 (http://www.openstreetmap.org/browse/way/-11092) has less than 2 points - deleting it
> 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm:   Way 200 (http://www.openstreetmap.org/browse/way/-11091) has less than 2 points - deleting it
> 2010/02/23 14:49:09 INFO (Osm5XmlHandler): cambodia.osm:   Way 100 (http://www.openstreetmap.org/browse/way/-11094) has less than 2 points - deleting it
>
> Can you reduce the number of points in the ways?
>
> Mark
>
>   

Reducing the number of points sounds like a good idea and I have read of 
tools that do this. The import is from shapefiles originally, so I think 
I can manage this.

But why do the national boundaries display correctly when I delete the 
contour lines? Something is wrong. The line that is being dropped is a 
single line with 22,668 points.

Garvan