[mkgmap-dev] Fwd: OpenStreetMap e-mail - mkgmap bug report

Wed Jul 8 18:55:27 BST 2009

Hi Steve,

Well, that's a bit odd. If you download this area into
JOSM, it looks similar(ish) but by no means exactly the same. If you
then run that area through mkgmap and look at the result with
mapsource, it looks OK. I am wondering if the map image in the email
was made from out of date OSM data that contained the problems the
image shows?

Cheers,

Mark

-------------------

> I'm am forwarding this email, with permission, in the hope that someone
> can help before I able to look at it at the weekend.
> 
> ----- Forwarded message from Valentijn 
> 
> Date: Wed, 08 Jul 2009 10:47:43 +0100
> Subject: OpenStreetMap e-mail - mkgmap bug report
> 
> Hello Steve,
> 
> Marvellous piece of work, mkgmap! Incredible, really. Although, naturally, there are a few glitches and here's one of them.
> 
> It could be that there's glitches between the connections between two parts of a map (as I'd guess that the position is somewhere between two sub-maps), but I'm not 100% sure of that.
> 
> This http://tile.openstreetmap.nl/?zoom=17&lat=52.01375&lon=5.11781&layers=B00000FF is the position on OSM, and this http://valentijn.sessink.nl/temp/CIMG7132.JPG is how it shows up on my Garmin Nüvi 250, while what I did follows shortly. Please note that I did not use "remove-short-arcs" before, I added it *because* there were a few of these unconnected roads in this region and I thought that --remove-short-arcs would fix that. Now I'm not so sure anymore ;-)
> 
> I'll be happy to test new options and I hope this will help to improve mkgmap (if not, please ignore ;-)
> 
> Best regards,
> 
> Valentijn Sessink
> 
> #!/bin/sh
> memory=1700m
> kaart=`mktemp -d`
> 
> cd $kaart
> echo 'Downloading Netherlands...'
> wget 'http://download.geofabrik.de/osm/europe/netherlands.osm.bz2'
> bunzip2 netherlands.osm.bz2
> echo "Downloading mkgmap.jar...
> wget 'http://www.mkgmap.org.uk/snapshots/mkgmap-latest.tar.gz'
> tar -zxf mkgmap-latest.tar.gz # this turns out to be mkgmap-r1080
> echo "Downloading splitter... "
> wget 'http://www.mkgmap.org.uk/splitter/splitter.jar'
> echo "Splitting Netherlands.osm... "
> java -Xmx$memory -jar ./splitter.jar --max-nodes=1000000 netherlands.osm 
> echo "done."
> echo "Rendering map... "
> java -Xmx$memory -jar mkgmap*/mkgmap.jar --country-name=Nederland --country-abbr
> =NL --latin1 --remove-short-arcs=4 --lower-case --route --preserve-element-order
>  --location-autofill-1 --gmapsupp --net -c template.args
> echo "done."
> echo $kaart
> 
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