OSM for developers

or, how I stopped worrying about layers, and love the database

Simone Cortesi @simonecortesi

Maurizio Napolitano @napo

OpenStreetMap is a live ecosystem

Open Database License (ODbL)

It's difficult

Understanding the data

there is no layer(s)
Tagging
Map Features, Taginfo

Existing Solutions

Linux, Virtual Machines
Osm2postgresql
OpenCageData
Geofabrik, Osm2Shp
Osm2pgsql, Osmosis

Solution

OSM “planet” files

Requesting large amounts of data from API can place undue load on the OSM server
API is really designed for adding and editing data, not retrieving
So OSM also makes its data available as downloadable “planet” files in OSM XML format, containing OSM data for the entire planet
Whole planet too large for most to use directly, so country or regional extracts available (eg. Geofabrik)

OSM planet is huge

The complete OSM Data
Latest Weekly Planet File: 33 GB
Latest Weekly Changesets: 782 MB

Rendering the map on your PC with Tilemill

Tilemill

Pavia
showing building age
colorcoding based on native OSM data
```
start_date=*
```
2 hour job
tilemill is free and opensource software

web visualization

Openlayers
Leaflet.JS
Modestmaps
d3.js
mapstraction

Leaflet.JS

overpass-api


<query type="node">
	<has-kv k="amenity" v="drinking_water"/>
	<bbox-query {{bbox}}/><!--this is auto-completed with the
	current map view coordinates.-->
</query>

GIThub - integration

geojson.io

overpass-api

realtime styling

overpass turbo query

ISTAT


  
    
  
  
            
    
  
  

{{style:
node {
  color:blue;
  opacity:0.2;
  width:3;
  fill-color:blue;
  fill-opacity:0.4;
  symbol-shape: circle;
  symbol-size: eval('max(3,min(200,0.02*Math.sqrt(tag("population"))))');
}
}}

Wikimedia Italia

Editing the data

JOSM

Standalone editor, written in Java
Powerful and flexible
Communicates with API over HTTP

Potlatch

Online Flash Editor
Easy to use

HTML5/JavaScript/d3.js, in early development

Help

help.openstreetmap.org
very active and helpfull mailinglst
Twitter @OpenstreetmapIT

products

product/service

Services

geocoding - routing - public transport - quality assurance

Geocoding

Search engine services

Nominatim (official with fair use policy ) by Mapquest (data under ODbL)
Cloudmade - with API commercial support (15$ per 100,000 transactions)
GISGraphy - with API commercial support

Search engine open source software

Nominatim php+postgresql
GISGraphy (LGPL) java+postgresql offers API for Android like Google
Photon (Apache License 2.0) java+postgresql+solr used in komoot

Komoot (top)

Komoot (bottom)

Routing

There are many offline, embedded and web-based routing services using OpenStreetMap data
Please visit: http://wiki.openstreetmap.org/wiki/Routing

pg_routing: extension for postgis with osm data support GPL,C++
OSRM C++,BSD, research oriented
Graphhoper Java, Apache, Scales from big server to mobile device, works on Raspberry Pi
Spatialite VirtualNetwork C, GPL/LGPL/MPL, portable

... and other services in the cloud made available by Cloudmade, MapQuest, Skobbler...

Public Transport

OpenTripPlanner provides a range of passenger information and transportation network analysis features using our infrastructure for finding itineraries combining transit, pedestrian, bike, and car segments.
network from osm, tpl from gtfs sources, lgpl, java