[mkgmap-dev] [locator] Boundary file GPX converter

Fri Apr 29 17:16:03 BST 2011

I have committed a converter that converts one or more precompiled 
boundary files to GPX files. This is necessary to answer the numerous 
questions "Why is this street not mapped to town A" etc.
It is also very useful for the development.

How does it work?

Call
java -cp mkgmap.jar 
uk.me.parabola.mkgmap.reader.osm.boundary.BoundaryFile2Gpx 
bounds_200000_50000.bnd

This creates a GPX files from the boundary file named 
gpx/bounds_200000_50000.bnd/admin_level=<L>/<L>_<id>_<O>_<n>.gpx
where
<L> = admin_level
<id> = boundary id (r3000 = Relation 3000; w29945 = way 29945)
<O> = o means outer boundary, i means inner boundary (same meaning as in 
multipolygons)
<n> = an ascending number within each id

The GPX files makes it easy to analyze the files with JOSM or any other 
GPX viewer.

By the way:
This is a PERFECT place for anyone who want to start with mkgmap source 
code contributions. Having a few Java experiences you can start here to 
improve the converter or for example to write a check tool that outputs 
uncovered areas for each admin_level.
If you have any question about that feel free to ask me. It's really not 
very complicated.

WanMil