[OSM-dev] Source and algorithms

Robert (Jamie) Munro rjmunro at arjam.net
Mon Jul 28 23:21:35 BST 2008


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Vojtech Brtnik wrote:
| Hello everyone,
|
| I must admit, that I am a bit lost on the openstreetmap homepage, so
| maybe you can just forward me to appropriate places :)
|
| For the purposes of my master thesis at Uni, I am looking for
| documentation about OSM (OpenStreetMap). Is it avaiable to see
| algorithm description

There aren't really any "algorithms" as such, just data, available as
XML. Lots of people use lots of algorithms to do things with the data,
and to create the data, but the project is the data, not the algorithms.

| and data representation that you use in OSM?

Basically, this is it:
http://wiki.openstreetmap.org/index.php/Data_Primitives

| Is there any API, that one could use for a plugin or application using
| OSM somehow?

Download the whole thing, updated once a week:
http://planet.openstreetmap.org/

Access the real live data:
http://wiki.openstreetmap.org/index.php/Protocol

Access a replicated copy of the data, which may be a little out of date
(usually only a few minutes), but with more query options:
http://wiki.openstreetmap.org/index.php/Osmxapi

Convert the data to an sql DB, and keep your own replica from the daily,
hourly, or minute by minute change files:
http://wiki.openstreetmap.org/index.php/Osmosis  (for MySQL)
http://wiki.openstreetmap.org/index.php/Mapnik#osm2pgsql  (for PostGIS)

The code for the servers and many utilities is browsable at:
http://trac.openstreetmap.org/

Robert (Jamie) Munro
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