[Routing] OpenStreetMap routing service

[Brett Henderson]

On Mon, Sep 8, 2008 at 7:50 PM, Hakan Tandogan <hakan at gurkensalat.com>wrote:

>
> On Sun, September 7, 2008 19:44, Nic Roets wrote:
> > Hello Hakan,
> >
> >
> > If you're interested in Europe, you can script a daily download from
> > Frederik Ramm's geofabrik.de site. Importing into gosmore requires 256
> MB
>
> Can I apply a (worldwide) hourly diff to a planet extract from
> geofabrik.de or would I have to extract the appropiate area from the diff
> file first?


There are two steps that have to be performed in a specific order:
1. Apply the worldwide diff to the planet extract.
2. Run the result file through a bounding box task to remove unwanted data
outside the area of interest.


>
>
> Are there scripts in SVN that already to this diff application?


Osmosis will do this for you, something like this:
osmosis --read-xml-change hourlydiff.osc.gz --read-xml planet-extract.osm.gz
--merge --bounding-box left=x right=x top=x bottom=x --write-xml
updated-planet-extract.osm.gz

If you wish to automate this process you can use this script launched hourly
from cron:
http://www.bretth.com/myanmar/replicate_osm_file.sh

It uses a special task called --read-change-interval which automates the
downloading of relevant diff files from the server and merging into a single
changeset.  It requires a working directory which is created with the
--read-change-interval-init task as documented here:
http://wiki.openstreetmap.org/index.php/Osmosis/DetailedUsage#--read-change-interval-init_.28--rcii.29
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