Building a Crowd-sourcing Tool for the Validation of Urban Extent and Gridded Population<br />Steffen Fritz, Linda See, Ia...
Importance of global land cover<br />Global land cover is baseline information for a wide variety of application:<br />To ...
Problems with global land cover<br />When different products are compared, there are lots of disagreement between them<br ...
Disagreement in Crop/Forest Domains<br />
Spatial disagreement<br />
Urban areas<br />Rapid urbanisation – led to many problems<br />> 50% of the world’s pop live in cities<br />By 2050, set ...
Estimates from different products<br />
Disagreement in the urban domain<br />
Urban disagreement between GLC-2000 and MODIS<br />
geo-wiki.org<br />Crowd-sourcing application to improve land cover<br />
Architecture<br />
urban.geo-wiki.org<br />
Disagreement layers<br />
Validation of urban land cover<br />
Validation of urban land cover<br />
GRUMP population layer<br />
Future Developments for urban.geo-wiki.org<br />Building a hybrid map of urban areas – already carried out for the croplan...
Validation Competition<br />We will be running a competition this summer<br />Email me (see@iiasa.ac.at) or see me afterwa...
Thank you!<br />For further information, please contact us:<br />Steffen Fritz (fritz@iiasa.ac.at)<br />Linda See (see@iia...
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Building a Crowd-sourcing Tool for the Validation of Urban Extent and Gridded Population

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Building a Crowd-sourcing Tool for the Validation of Urban Extent and Gridded Population
Steffen Fritz, Linda See, Ian McCallum, Michael Obersteiner - International Institute of Applied Systems Analysis
Christian Schill - University of Freiburg
Christoph Perger - University of Applied Sciences Wiener Neustadt

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Building a Crowd-sourcing Tool for the Validation of Urban Extent and Gridded Population

  1. 1. Building a Crowd-sourcing Tool for the Validation of Urban Extent and Gridded Population<br />Steffen Fritz, Linda See, Ian McCallum, Christian Schill, ChristophPerger and Michael Obersteiner<br />International Institute of Applied Systems Analysis (IIASA)<br />Austria <br />
  2. 2. Importance of global land cover<br />Global land cover is baseline information for a wide variety of application:<br />To delineate ecosystems <br />Inputs to global models of land use and land use change, e.g. Globiom<br />Climate change mitigation policies e.g. REDD<br />Biofuel debate: where is the additional land? <br />Food security<br />
  3. 3. Problems with global land cover<br />When different products are compared, there are lots of disagreement between them<br />One might say cropland, another forest<br />Confusing if you are a user – which one is correct? Which is the best product to use?<br />Study by Quaife et al – on veg modelling<br />Disagreement overall and/or spatially<br />
  4. 4. Disagreement in Crop/Forest Domains<br />
  5. 5. Spatial disagreement<br />
  6. 6. Urban areas<br />Rapid urbanisation – led to many problems<br />> 50% of the world’s pop live in cities<br />By 2050, set to increase to 80% <br />Accurate figures needed to estimate resource use, e.g. future carbon emissions, domestic water consumption, infrastructure, housing, etc.<br />Difficult to classify<br />
  7. 7.
  8. 8. Estimates from different products<br />
  9. 9. Disagreement in the urban domain<br />
  10. 10. Urban disagreement between GLC-2000 and MODIS<br />
  11. 11.
  12. 12.
  13. 13. geo-wiki.org<br />Crowd-sourcing application to improve land cover<br />
  14. 14. Architecture<br />
  15. 15. urban.geo-wiki.org<br />
  16. 16. Disagreement layers<br />
  17. 17. Validation of urban land cover<br />
  18. 18. Validation of urban land cover<br />
  19. 19. GRUMP population layer<br />
  20. 20. Future Developments for urban.geo-wiki.org<br />Building a hybrid map of urban areas – already carried out for the cropland domain<br />Addition of other datasets<br />E.g. Night time luminosity, Open Street Map<br />Ability to validate the population data<br />Addition of a gaming element<br />Change studies through integration of Landsat imagery<br />30 m land cover map being developed<br />
  21. 21. Validation Competition<br />We will be running a competition this summer<br />Email me (see@iiasa.ac.at) or see me afterwards and I will put you on the mailing list<br />Register for urban.geo-wiki.org<br />Validate at least 100 points to qualify<br />Highest number of validations will be awarded a prize<br />
  22. 22. Thank you!<br />For further information, please contact us:<br />Steffen Fritz (fritz@iiasa.ac.at)<br />Linda See (see@iiasa.ac.at)<br />

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