[Routing] Q: how to find street/city match?

[Marcus Wolschon]

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Danny Backx schrieb:
> Is there a way to figure out which streets belong to a city with the OSM
> data ? If the user enters a street/city/country triplet into a GPS
> application, how does it know what to do?


Hello Danny,

In the code at
http://travelingsales.svn.sourceforge.net/viewvc/travelingsales/libosm/src/org/openstreetmap/osm/data/searching/
especially
http://travelingsales.svn.sourceforge.net/viewvc/travelingsales/libosm/src/org/openstreetmap/osm/data/searching/AddressDBPlaceFinder.java?view=markup

I am using polygons whereever the map provides them.
If I only find a single node I all back to estimating a radius
based on the kind of city/hamlet/village/.
This data is stored in a trivial embedded database and then used
for searching.
There is currently nothing we can do about country-borders I'm afraid
except using external shape-files or this.

Everything on interpreting the osm-data for this purpose
should be documented at
http://wiki.openstreetmap.org/index.php/OSM_tags_for_routing#Is_inside.2Foutside
and
http://wiki.openstreetmap.org/index.php/Routing

PS:
If you find any algorithm that works on the existing data for
country-borders we have, please let me know. Our borders are in no
condition to be parsed by one single algorithm that can give you
one definite area for inclusion-tests.

Marcus


> 
> I'm trying to get this kind of stuff in the RoadMap application.
> 
> 	Danny

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