things to do with openstreetmap



Lluís Vicens
SIGTE - University of Girona

overview

  • Available Data Sources and Download Options
  • Data Processing and Edition
  • Creating Maps on the web
  • Database import
  • Rendering and Styling
  • Routing
  • Advanced Tools: Libraries, Widgets, Frameworks

objective



  • Detection and summarize the different existing options, as well as potential applications using OSM data





  • Detection of new services and applications to be ofered for the benefit of the university community

1.1 Basic Available Data Sources & Download


a) Planet OSM

a) Planet OSM



A single file (20/25GB)

"All the nodes, ways and relations that make up your map"

Weekly updated

PBF or OSM XML

1.1 Basic Available Data Sources & Download


a) Planet OSM

b) HISTORY

b) History



  • A single file ( > 39 Gb)


  • "Full editing history of the OSM database"


  • Monthly / Yearly updated


  • Latest: 08 - feb - 2013

1.1 Basic Available Data Sources & Download


a) Planet OSM

b) HISTORY

c) Diff. Files

c) Diff. files


"Contains changes in the OSM data over some period in time"


Minute / Hour / Day


Format = osmchange

File format used by osmosis, and osmconvert


Contains: creations / modifications / deletions

1.2 Other download options


a) By country / Region / Area

 

  How to ...

Geofabrik


ThinkGeo

bbbike

metro

weogeo

Or you can directly download data from OSM.ORG


«DEMO»

1.2 Other download options


a) By country / Region / Area


b) By Small Region or by Typology

b) By Small Region... (I)


Tool: XAPI (Extended OSM API with search and query capabilities). Example of data download by BBOX:


http://open.mapquestapi.com/xapi/api/0.6/*[bbox=2.81962,41.98036,2.82984,41.98782]


Example of data download by BBOX and TAG/ELEMENT:


http://open.mapquestapi.com/xapi/api/0.6/node[amenity=library][bbox=2.81962,41.98036,2.82984,41.98782]


«DEMO TIME»


OSM XML & QGIS 

b) By Small Region... (II)


Tool: Overpass.API (Optimized, search criteria by location, type of objects, tag properties, proximity... or a combination)

Bars and campings in Girona:
http://overpass-api.de/api/interpreter?data=(node(41.9511,2.7898,42.0071,2.8696)[amenity=bar];node(41.9511,2.7898,42.0071,2.8696)[tourism=camp_site];);out%20meta;

All about Girona:
http://overpass-api.de/api/interpreter?data=area[name=%22Girona%22];way(area);(._;%3E;%3C);out%20meta;

2.1 Data Edition


> How to participate? 

Data Capture: GPS & Digitizing

> What to edit?

Add new lines / points / areas
Modify existing lines / points / areas
Correct errors and mistakes
Assign "characteristics" to elements

2.1 Data Edition


> TAGS

Each element has a TAG (or several TAGS) that give us its main characteristics

"Visit OSM Map Features page"


Wrong TAG -> Wrong search -> Wrong result

2.1 Data Edition



Map Generation = Validation + Upload

2.2 Data Edition Tools


More info:  http://wiki.openstreetmap.org/wiki/Editing

2.3 Top Data Editors: JOSM

2.3 Top Data Editors: JOSM


Offline editor

Simple and complex editions

Import GPS tracks, manual digitizing, use of WMS, Topology validation and upload

Extra functionalities

Documentation

2.3 Top Data Editors: Merkaartor

2.3 Top Data Editors: Merkaartor


Offline editor

Slightly different to JOSM

Some specific tools: transparency

Documentation

2.3 Top Data Editors: Potlatch2

2.3 Top Data Editors: Potlatch2


Online editor

Simple and fast editions

Basic tools for edition and labelling

Documentation

2.3 Top Data Editors: iD

2.3 Top Data Editors: iD


Online editor

Fast and friendly, intuitive GUI

Simple and fast editions

Tools for editing and labelling

Supports displaying and editing route relations and turns restrictions

Documentation

a) Tool: API Leaflet


Tool: API Leaflet

With just a few lines of code

It's Javascript! (executed on client side)

No requirements on server side

3. Creating maps on the web


a) Tool: API Leaflet



«DEMO TIME»


MYFIRSTMAP.HTML

4. Database import


Each tool generates a specific database
Different database -> Different purposes
Data organized by SCHEMA:
# number of tables, columns and relations

4. Database import


Tool: osm2pgsql
Grouped by Feature type

Tables: 
# planet_osm_points
# planet_osm_line
# planet_osm_polygon
# planet_osm_road



Configuration: default.style

4. Database import


Tool: imposm
1 table for each type of entity

Tables:
# amenities
# places
# buildings
# ...



Tables with simplified spatial entities
Configuration: defaultmapping.py


Examples


$ osm2pgsql -U postgres -H sig7.udg.edu -W -P 5433 -d webinar_osm -E 25831 /home/lluis/Baixades/girona.osm
$ imposm --read /home/lluis/Baixades/girona.osm --overwrite
$ imposm --write -h sig7.udg.edu -d webinar_osm -p 5433 -U postgres --proj=EPSG:25831
osm2pgsql for windows: Yes
Imposm 3 (development) for windows: Yes
Osmosis for windows: Yes

4. Database import


Osmosis is a "swiss knife" toolkit:

# generate dumps of a DDBB
# imports osm data into a DDBB
# produce change sets based on:
## history tables
## two planet dumps
# apply change sets to a DDBB
# extract data inside a bbox or polygon
# ...

5. Rendering


Rendering Tools: 

# Mapnik 

> http://www.mapnik.org


# TileMill 

> https://www.mapbox.com/tilemill


5.1 Rendering with Mapnik


Allow the generation of raster layers (PNG, JPEG, PDF, ...) based on geospatial data

Supports shapefiles, PostGIS, TIFF, raster layers, OSM as well as other formats suported by the GDAL/OGR library

An XML (similar CSS) is used for the map design process


Mapnik is the rendering engine used by OSM or MapQuest

5.2 Rendering styles with TileMill


Is a desktop application developed for cartographic design, built upon Mapnik

Uses CartoCSS as a stylesheet language 

Allow us to define styles and render images (over mapnik). Supports osm2pgsql and imposm schemas 

OSMBright is a Tilemill project that offers a basis and templates for styling OSM data

6. Routing Tools


Tool: Osm2po 
Multiplatform || requires Java 6+

Osm2po includes a GUI. Offers the possibility to generate SQL expressions compatible with pgRouting

6. Routing Tools


Tool: Osm2pgrouting
Requires PostgreSQL, PostGIS and pgRouting

Osm2pgrouting imports the data (osma format) directly to a PostgreSQL / PostGIS database while generates the graph structure

6. Routing Tools


Tool: Osrm (C++)

Osrm implements a high performance routing engine fro shortest paths in network analysis

It's very fast!

7. Other Libraries


Java, Perl, PHP, Python, R, Ruby


Imposm parser, osmread, J2memap, libosm, libOSM, libosmscout, libRoadNav, MapJumper, osm4routing, OSMLib, OsmSharp, ...

8. Widgets


BruTile, COSMCrtl, Halcyon, JXMapViewer, JMapViewer, JXMapKit, kogutowicz, libchamplain, Mapsforge, ...

9. Frameworks


# Osmium

# Osmosis

#OSMNavigation

# libOSM

# Cloudmade


More info: http://wiki.openstreetmap.org/wiki/Frameworks

A lot of thanks!


Lluís Vicens
SIGTE - University of Girona

Things to do with OSM

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