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Field Geometry, auto steering and services

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Planning of field traffic maximises field use and minimises overlaps of tracks.

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Field Geometry, auto steering and services

  1. 1. Field geometry, auto steering & services Sytze de Bruin, Wageningen University Lab. for Geo-Information Science and Remote Sensing Henk Janssen: Alterra, Wageningen UR
  2. 2. Contents <ul><li>Context </li></ul><ul><li>Results </li></ul><ul><li>Methods </li></ul><ul><li>Conclusions / current work </li></ul>Crop & nature Web service Field trial, 20 farmers
  3. 3. Societal and environmental demands <ul><li>Green & blue services </li></ul><ul><li>Biodiversity </li></ul><ul><li>Fauna </li></ul><ul><li>Water & carbon storage </li></ul><ul><li>Landscape diversity </li></ul><ul><li>Environment </li></ul>
  4. 4. Effects for farmer <ul><li>soil physical properties (permanent tracks) </li></ul><ul><li>pest control </li></ul><ul><li>crop pollination </li></ul><ul><li>soil fertility </li></ul><ul><li>… paid service </li></ul><ul><li>invasion of weeds </li></ul><ul><li>persistence of weeds </li></ul><ul><li>loss of productive area </li></ul><ul><li>… </li></ul>
  5. 5. GPS-guided steering - supported by planning
  6. 7. Project <ul><li>3 phases </li></ul><ul><li>> 20 farmers </li></ul><ul><li>financing: province & municipalities </li></ul><ul><li>Dutch PPL programme </li></ul><ul><li>2011: 30 farmers </li></ul>
  7. 8. GAOS: G eo A rable field O ptimisation S ervice
  8. 17. Effect revenues (subsidy) margins vs. crop Depends on geometry and other costs (turning) 0% 50% 99%
  9. 19. Data exchange (2 manufacturers)! 10m <ul><li>straight lines </li></ul><ul><li>curves </li></ul><ul><li>field geometry </li></ul><ul><li>operations </li></ul>
  10. 20. Geo Arable field Optimisation Service Optimisation script get input data compute set of angles compute set of positional shifts for each angle: for each shift: compute a parallel swath pattern for each potential field margin: if € condition: delete swaths overlapping margin else: cut swaths at intersection compute areas cost = sum partial costs retain design with lowest cost add headlands generate output data Python, OGR geospatial library <ul><li>Internet GIS client: </li></ul><ul><li>Visualisation </li></ul><ul><li>Data entry </li></ul><ul><li>Updating geometry (split, merge) </li></ul><ul><li>Implementation: </li></ul><ul><li>Adobe Flex platform (Luigi) </li></ul><ul><li>Web Map Service (OGC) </li></ul><ul><li>(Transactional) Web Feature Service (OGC) </li></ul><ul><li>Current development: WPS </li></ul>
  11. 21. Finding best fit of swaths and margins Exhaustive search
  12. 22. Accurate field geometry
  13. 23. RTK-GPS data acquisition
  14. 24. Feedback <ul><li>Plan in advance (winter) </li></ul><ul><li>Simple fields OK </li></ul><ul><li>Full width spray paths </li></ul><ul><li>Export functionality (2x) </li></ul><ul><li>Others join </li></ul><ul><li>System stability </li></ul><ul><li>Headlands & complex field shapes </li></ul><ul><li>Spray paths, sections closed </li></ul><ul><li>Curves </li></ul><ul><li>Weeds! </li></ul>
  15. 25. Conclusions / current work (PPL project) <ul><li>Better support for “complex” field geometry  </li></ul><ul><li>Improved stability (engine: WPS)  </li></ul><ul><li>Support for CTF </li></ul><ul><li>Improved user interaction (terminology, editing, interface) </li></ul><ul><li>Edge smoothing  </li></ul>
  16. 26. Plans <ul><li>Extend user group & area </li></ul><ul><li>Contribute to multifunctional field geometry standard </li></ul><ul><li>Support variable rate application </li></ul>
  17. 27. Thank you

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