[mkgmap-dev] [PATCH] Inter-Tile routing - alpha code for testing

Tue Feb 17 18:19:03 GMT 2009

On Sun, Feb 15, 2009 at 11:23 AM, Mark Burton <markb at ordern.com> wrote:
>
> Here's a version that removes any nodes introduced by the clipper if
> they are too close to an existing node on the same way.
>
> I'm not sure if this is the right approach so comments are welcome.

I tried this patch out (with the latest trunk), however my initial
tests did not work. Please let me know what information you would like
for a diagnosis. Here is the procedure I used:

1. Downloaded germany.osm from geofabrik.de and used the splitter from
SVN with the following options:

   java -Xmx1024m -jar ..\splitter-svn.jar --max-nodes=800000 germany.osm

2. Called the patched mkgmap as such:

   java -Xmx1536M -jar ..\mkgmap-svn\mkgmap.jar --route --tdbfile
--tdb-v4 --product-id=1 --family-id=523
--series-name=osm-de-rt-20090216 --country-name=Germany
--country-abbr=DE --latin1 --code-page=1252 --road-name-pois
--style-file=..\styles\blarg-route 63*.osm.gz

(I forgot the roundabout-frig option)

mkgmap then gave a lot of messages similar to the following:

Way K 7006's last point at 52.91016/12.02696 is a boundary node
Way K 7005's last point at 52.91016/11.92830 is a boundary node
Way K 7005's first point at 52.91016/11.88691 is a boundary node
Way K 7005's last point at 52.91016/11.88111 is a boundary node

This was tested on a Windows Vista machine (sorry, that's what I had available).

Am I perhaps missing an option or similar? I believe that splitter.jar
correctly creates boundary boxes, so that should not be a factor.

To test the inter-tile routing I used Mapsource (this has generally
been a reliable indicator of routing success), and first created a
simple route on an Autobahn within a tile. This worked correctly. I
then added to the route another point on the same Autobahn, not far
away, but across a tile boundary. Mapsource took longer to calculate
the route, but then added a straight line between the last two points,
instead of routing along the Autobahn.

I hope this helps you in some way.

Cheers.