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Osm techniques and developemnt
- 1. OSM Techniques and Development of OpenStreetMap (OSM) at Dongpo Deng dongpo@iis.sinica.edu.tw Feb. 7. 2012 Tuesday, February 7, 2012
- 2. Forbidden city 2012-01 Snapshot on 2012-1-20 Tuesday, February 7, 2012
- 3. Tuesday, February 7, 2012
- 4. OSM and me • Do mapping in central TW and eastern NL • Edit ‘Map Feature’ (zh-tw) • Host Taiwanese mapping parties • My future work for OSM • Lobby for open geo-data • Establish TW local chapter of OSM • Do researches on OSM • Participate to SotM 2012 Tuesday, February 7, 2012
- 5. The major components of OSM • Portal sites • Backend databases • Editors • Rendering systems • Data sources • Wiki documents • OSM APIs • Mapper communities Tuesday, February 7, 2012
- 6. Go to map the world Tuesday, February 7, 2012
- 7. Go to map the world • OpenStreetMap (OSM) is non-for- profit foundation • OpenStreetMap (OSM) is a collaborative project to create a free editable map of the world • Shared by OdbL 1.0 (Changed from By-SA 2.0 since 2012) Tuesday, February 7, 2012
- 8. Grassroots mapping • Wiki-style editing environment • Open License, Open Geo Data • Volunteered Geographic Information Tuesday, February 7, 2012
- 9. OSM can be used for... • Map browsing, • Map rendering, • Searching, • Reverse geocoding, • Exporting, • Online edition. Tuesday, February 7, 2012
- 10. A simple way to contribute data • GPS traces • Geotagged Photos • Paper and pen (walking-papers.org) Tuesday, February 7, 2012
- 11. As a OSM mapper, you not only upload data but also DRAW the map • Draw the map via uploaded GPS traces, arial and satellite images, etc • Edit the data attributes • Name, e.g. street, building • Street type • POI • Traffic artifact ... ,etc Tuesday, February 7, 2012
- 12. Mappers drawing Taipei Tuesday, February 7, 2012
- 13. Architecture of OSM Tuesday, February 7, 2012
- 14. Map Editors Tuesday, February 7, 2012
- 15. Front-end editors • Online • Potlatch (Popular!) • Mapzen • Amenity Editor • Offine • JSOM (Popular!) • Merkaartor • Plugins QGIS See more info http://wiki.openstreetmap.org/wiki/Editors Tuesday, February 7, 2012
- 16. Polatch2 Tuesday, February 7, 2012
- 17. Mapzen mapzen.cloudmade.com Tuesday, February 7, 2012
- 18. Amenity Editor http://ae.osmsurround.org/ae/index Tuesday, February 7, 2012
- 19. JSOM Tuesday, February 7, 2012
- 20. Merkaator http://merkaartor.be/ Tuesday, February 7, 2012
- 21. OSM Plugins for QGIS Tuesday, February 7, 2012
- 22. Mobile Editors • Apple iOS • iPhone • Symbian • Nokia • Andriod See more details http://wiki.openstreetmap.org/wiki/Software Tuesday, February 7, 2012
- 23. Data resources: GPS traces Tuesday, February 7, 2012
- 24. Data resources: GPS traces Tuesday, February 7, 2012
- 25. Data source: Online Mapping systems • Oline mapping systems and open geo-data resources • Yahoo! areal : way, landuse... • Landsat : main way, large landuse... • WMS services: OpenArialMap • Don't copy other map if the geodata contains copyright issues! Tuesday, February 7, 2012
- 26. Open GeoData to OSM • CC-licenced geo-data resources directly import to OSM • AND (Automotive Navigation Data) : Netherlands, India and China • TIGER data on USA • Corine Land Cover (Estonia, Romania, Hungary and France) • Ordnance Survey (UK) • County of Brest, France • National parks (FR) • ... Tuesday, February 7, 2012
- 27. Backend Tuesday, February 7, 2012
- 28. Backend database: PostgreSQL • OSM doesn’t use geometry type of PostgreSQL and geospatial functions of PostGIS. • OSM API v0.6 is used for the main central OSM DB running on servers. • http://wiki.openstreetmap.org/wiki/API_v0.6 • Osmosis is used to populate a more general PostgreSQL/PostGIS DB from Planet.osm dump file. • http://wiki.openstreetmap.org/wiki/Osmosis Tuesday, February 7, 2012
- 29. Database schema Text Text Relation & old data User Data Tuesday, February 7, 2012
- 30. Tuesday, February 7, 2012
- 31. Tuesday, February 7, 2012
- 32. Tuesday, February 7, 2012
- 33. Geometry model Node Way Open ployline Closed ployline Area Relation Tag See detail info http://wiki.openstreetmap.org/wiki/Data_Primitives Tuesday, February 7, 2012
- 34. Map feature • Key / value • higway = motorway • name = • ref = Fwy3 • maxspeed=110 • Recommended usage • (wiki:Map Features) • Consensus (Tagwatch, OSMdoc) • Homogeneity : data reuse • Requirement adjust Tuesday, February 7, 2012
- 35. Rendering system Tuesday, February 7, 2012
- 36. Mapnik www.mapnik.org • OSM uses Mapnik to render 256 X 256 pixels tiles • osm2pgsql is used to convert OSM data to postgreSQL for Mapnik rendering • Map sytles are controlled by stylesheet (XML) files. • Useful tutorial! https://github.com/ mapnik/mapnik/wiki/MapnikTutorials Tuesday, February 7, 2012
- 37. Mod tile • Mod tile is a system to serve tiles, for example to use within a slippy map. • The implement of Mod file is split into two ports • mod_tile is a custom Apache module which is responsible for serving tiles and requests the rendering of tiles • renderd - A rendering daemon which calls mapnik and writes the map tiles to the filesystem Tuesday, February 7, 2012
- 38. tile@home • Tiles@home (short: T@H or tah) is a distributed program to render Osmarender maps. • T@H has a server software, Tahngo (generation 2), running at the Tiles@home website, which get requests to render tiles from updated mapdata. Tuesday, February 7, 2012
- 39. Browsers Tuesday, February 7, 2012
- 40. Slippy map • The slippy is an Ajax component. JavaScript runs in the browser, which dynamically requests tiles from the server in the background (without reloading web page) to give a smooth map browsing experiences. • The implementation of slippy map is mostly provided by OpenLayers • The tiles rendering usually comes from two resources • Mapnik tile rendering • Osmrender (tiles@home) tile rendering See details http://wiki.openstreetmap.org/wiki/Develop Tuesday, February 7, 2012
- 41. Wiki documents Tuesday, February 7, 2012
- 42. OSM community • Three main factors: wiki, mailing lists, mapping party source: http://vaes9.codedgraphic.com/ Tuesday, February 7, 2012
- 43. Applications/Services based on OSM techniques See details http://wiki.openstreetmap.org/wiki/ List_of_OSM_based_Services Tuesday, February 7, 2012
- 44. Crisis Map • shahanafoundation.org • Ushahidi.org Tuesday, February 7, 2012
- 46. histOSM.org Tuesday, February 7, 2012
- 47. Real-time train map http://kubus.mailspool.nl/spoorkaart/ Tuesday, February 7, 2012
- 48. Humanitarian Response and OSM Tuesday, February 7, 2012
- 49. OSM Humanitarian Data Model Tuesday, February 7, 2012
- 50. OSM in Haiti Souce: Maron 2010 Before earthquake 7 days after earthquake Tuesday, February 7, 2012
- 51. Researches on OSM Tuesday, February 7, 2012
- 52. OSM participants Tuesday, February 7, 2012
- 53. Number of Publications indexed by Google Scholar Tuesday, February 7, 2012
- 54. Some research topics on OSM • data quality, ontologies, top-down process (Muki Haklay) • 3D models and routing applications (Zipf et al.) • Neocartography and geovisualization (Chilton, O’Brien) • Semantic, ontologies (Bishr, Antoniou) • Technical application (Mooney) • Trust and general quality (van Exel) Tuesday, February 7, 2012
- 55. Types of research with OpenStreetMap • Muki Haklay (2011) summarized three types • With OSM - Working close to OSM community to identify research needs and follow them (Wiki Research Ideas page) • About OSM Learning about OSM, and the community as part of VGI. Comparing it to other projects • Using OSM–Using the data set to create new applications and explore scientific issues Muki Haklay (2011) State of the Map EU - OpenStreetMap and GIScience research, State of the Map (SotM) 2011 Tuesday, February 7, 2012
- 56. Important open questions • Cultural differences and the impact on mapping • Impact of imports, and the rate and nature of updates of well mapped areas • Spatial and temporal patterns of engagement and contribution, role of ‘slient’ mappers • ‘Tyranny of place hypothesis’ and the impact of specific individual on mapping an area • Internal culture and impact on gender, exclusion and long term engagement • Legal studies - license use cases and application • Usability (see Weber and Jones 2011) Source: Muki Haklay (2011) Tuesday, February 7, 2012
- 57. Limitations of academic research / collaboration • Short attention span - the incentives are for novelty, not routine • Publications are important, so research ideas are welcomed • Academic institutes can provide power and network (up to a point), not money • Enthusiastic students are available at specific time cycle • Across the world, match funding for business, so introductions needed • Academia careers have thematic focus Source: Muki Haklay (2011) Tuesday, February 7, 2012
- 58. Code of engagement for OSM research • Rule 1– Join a mapping party. • Rule 2 – Read OSM wiki, books, blogs, and mailing lists • Rule 3 – Explore the data. • Rule 4 – Open assess. • Rule 5 – Open knowledge. • Rule 6 – Be a critical friend. • Rule 7 – Teach. Source: Muki Haklay (2011) Tuesday, February 7, 2012
- 59. Code of engagement for OSM research • Maintain links with the OSM community –it will pay off and will help you to identify new research directions. • Also maintain links with in the VGI research community –even if the term is awkward, the research is valuable. • Explore comparisons and parallels –it’s important to learn what is going on in other projects. Source: Muki Haklay (2011) http://wiki.openstreetmap.org/wiki/Research Tuesday, February 7, 2012
- 60. Remarks • OSM is a wiki-style map based on open sources and open data. • OSM is a collaboration community. All participants are volunteers. • More and more services and applications use OSM data and techniques. • OSM is a good instance of VGI. Many researchers around the world are working on OSM. Tuesday, February 7, 2012
- 61. Question! State of the Map 2012 in Tokyo Taiwan Mapping party on Feb. 18, 2012 Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License Tuesday, February 7, 2012