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Steffen Fritz & Mathias Karner Ecosystem Services and Management Program (ESM) IIASA

The geo-wiki open data project: harnessing the power of volunteers and experts to improve data quality on global land-use. Steffen Fritz & Mathias Karner Ecosystem Services and Management Program (ESM) IIASA. Nature Correspondence, Citizens add to satellite forest maps,

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Steffen Fritz & Mathias Karner Ecosystem Services and Management Program (ESM) IIASA

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  1. The geo-wiki open data project: harnessing the power of volunteers and experts to improve data quality on global land-use Steffen Fritz & Mathias Karner Ecosystem Services and Management Program (ESM) IIASA

  2. Nature Correspondence, Citizens add to satellite forest maps, Velde, See, Fritz, 342 | NATURE | VOL 490 | 18 OCTOBER 2012

  3. Land Cover GLC2000 (1km) MODIS v.5 – 2005 (500m) GlobCover 2005, 2009 (300m) GLC v.2 (1km) Regional products (CORINE, Africover) National products

  4. Why is it so important to improve global land cover? • Critical input dataset for many societal benefit areas, e.g. Ecosystems, Biodiversity, Energy, Climate, Disasters • Originally focus and applications - field of climate change projections • Now increasing demand from the integrated assessment community and the global biophysical modelling community, e.g. REDD • Cropland extent has been neglected, but is crucial for applications in the field of food security, assessing yield and production gaps • Also important for investment decisions both by governments as well as foundations (e.g. Gates)

  5. Fritz et al ERL, 2012 Disagreement in Africa in the cropland domain between GLC-2000 and MODIS v. 5

  6. Motivations behind Geo-Wiki • When different products are compared, there is a lot of disagreement between them • One product might say cropland, another grassland • Confusing if you are a user – which one is correct? Which is the best product to use? • Disagreement overall and/or spatially • Google Earth is one of the only affordable tools available to collect validation points globally (e.g. GlobCover, latest Chinese product) • Repository of validation/calibration data • Create a hybrid global land cover map (i.e. improve land cover)

  7. www.geo-wiki.org

  8. http://Geo-Wiki.org • Geo-wiki makes GEO data easy to visualize and analyze. • Volunteers from around the globe can classify Google Earth imagery, input their agreement/ disagreement with the existing data

  9. Spatial Disagreements

  10. Hybrid cropland map http://beta-hybrid.geo-wiki.org

  11. Competition.geo-wiki.org

  12. Collected more than 200 000 validation points

  13. Field Size

  14. Human Impact / Wilderness

  15. Geo-Wiki Family of Crowdsourcing Tools Livestock Contributes to Open Data

  16. New Technologies: Geo-Wiki mobile

  17. Collecting Ground Data

  18. Gaming • Civilization • Paint the landscape • Facebook ~ 93 million audience • Tile game • Taginator • Missions and conspiracies • Geocaching

  19. Game for Land Cover validation

  20. Thank you!

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