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Quick and easy land use classification with QGIS

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Land use classification doesn’t necessarily have to be expensive and complicated: you can get a good high level representation of current and potential land-use for a land block using freely available data and software. The results of a simple analysis can be used to create profit forecasts for your land that can be used in your land management plan.
In this short demo, we will use QGIS plugins and free data to create a land cover classification from satellite images, a slope analysis from the terrain model, and a land capability classification using the LandCare LUC database. We will then combine the results together to find out what areas of a land block are suitable for horticulture, pasture and forestry.

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Quick and easy land use classification with QGIS

  1. 1. QUICK AND EASY LAND USE CLASSIFICATION WITH QGIS SuzanneBergman GISAnalyst/Geologist
  2. 2. 2 downloadabledesktopGIS package Biginternational user community.Free supportandtraining. Compatiblewith multipleGISdata, databasetypes,web mapservices andmore. Availableformultiple operatingsystems.
  3. 3. QGIS DEMO: BEST AREA FOR HORTICULTRE TERRAIN LANDUSECAPABILITY Use free, current, opensource data to do a quick analysis of your land block. In this demo we are looking for areas best suited for horticulture. CURRENTLANDCOVER Flatlandwitha slope<10degrees LUCClass1–4 Arableland Grassland&Crops BareSoil
  4. 4. DATA SOURCES AND EXAMPLES Insert the title of your subtitle Here QGIS AND QUICK MAP SERVICES LINZ PORTAL LANDCARE RESEARCH https://data.linz.govt.nz/search/ https://lris.scinfo.org.nz/layer/48076-nzlri-land-use- capability/ SEMI-AUTOMATIC CLASSIFICATION PLUGIN https://fromgistors.blogspot.com/p/semi-automatic- classification-plugin.html https://data.linz.govt.nz/search/ HOP GROWING MODEL QGIS CLOUD QGIS COURSE MATERIAL FROM IMW https://qgiscloud.com https://lris.scinfo.org.nz/layer/48076-nzlri-land-use- capability/ https://storymaps.arcgis.com/stories/a56b38e7584c470e80 830d5088aaa9cb/
  5. 5. TERRAIN 1 2 3 DEM Slope Reclassify Slope
  6. 6. 1
  7. 7. 2
  8. 8. 2
  9. 9. 3
  10. 10. 3
  11. 11. 3
  12. 12. LAND COVER CLASSIFICATION Semi-automatic classification of remote sensing images. Download of free images (Landsat, Sentinel-2, Sentinel-3, ASTER, MODIS) Pre- and postprocessing SEMI-AUTOMATIC CLASSIFICATION PLUGIN 01 03 DownloadData 02 Clipdatatostudyarea Convertdatatosurfacereflectance 04 Definebandsetsandtraininginput 05 CreateROIs 06 Createaclassification
  13. 13. 01 DownloadData
  14. 14. 01 DownloadData
  15. 15. 01 DownloadData
  16. 16. 01 DownloadData
  17. 17. 01 DownloadData
  18. 18. 01 DownloadData
  19. 19. 02 Convertdatatosurfacereflectance
  20. 20. 02 Convertdatatosurfacereflectance
  21. 21. 03 Clipdatatostudyarea
  22. 22. 03 Clipdatatostudyarea
  23. 23. 03 Clipdatatostudyarea
  24. 24. 04 Definebandsetsandtraininginput
  25. 25. 04 Definebandsetsandtraininginput
  26. 26. Sentinel 2: 11-8-2 BANDSET 1: 9-7-1 Sentinel 2 4-3-2 BANDSET 1: 3-2-1 Sentinel: 4-8-12 BANDSET 1: 3-7-10 Orthophoto 04 Definebandsetsandtraininginput Natural colour Agriculture Vegetation and urban
  27. 27. 04 Definebandsetsandtraininginput
  28. 28. CLASSES AND MACROCLASSES CLASS MACROCLASS Forestry Pasture Horticulture Lakes Rivers Sea Buildings Roads Infrastructure Bare soil Dirt road WATER SOILBUILT- UPVEGETATION
  29. 29. 05 CreateROIs
  30. 30. 05 CreateROIs
  31. 31. 05 CreateROIs
  32. 32. 05 CreateROIs
  33. 33. 05 CreateROIs 05 CreateROIs
  34. 34. 05 CreateROIs 05 CreateROIs
  35. 35. 05 CreateROIs 05 CreateROIs
  36. 36. 06 Createaclassification
  37. 37. 06 Createaclassification
  38. 38. 06 Createaclassification
  39. 39. 06 Createaclassification
  40. 40. 06 Createaclassification
  41. 41. 06 Createaclassification
  42. 42. LAND USE CAPABILITY 1 2 3 4 5 6 7 8 Arable cropping suitability Pastoral grazing suitability Production forestry suitability General suitability High Low High Low Unsuitable Unsuitable Unsuitable Unsuitable High Low Pastoral or forestry land Multiple use land Increasinglimitationstouse Decreasingversatilityofuse LUC CLASS
  43. 43. LAND USE CLASSIFICATION RESULTS SLOPE LAND COVER CLASSIFICATION LAND USE CAPABILITY
  44. 44. WHY QGIS IS A SUPERHERO AllthetoolstocreateaGISenterprise platform Extensiveresources available online Easytouseandfree Pluginsavailable foreverything

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