Your SlideShare is downloading. ×
GIS in land suitability mapping
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

GIS in land suitability mapping

3,166
views

Published on

A Practical Demonstration of use of GIS in Precision Agriculture

A Practical Demonstration of use of GIS in Precision Agriculture

Published in: Education, Technology

3 Comments
4 Likes
Statistics
Notes
No Downloads
Views
Total Views
3,166
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
312
Comments
3
Likes
4
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Regional Centre for Training in Aerospace Surveys (RECTAS) Off Road 1, Obafemi Awolowo University Campus, P.M.B. 5545, Ile-Ife, Nigeria Global Spatial Data Infrastructure (GSDI) Training WorkshopTheme: “Spatial Data Infrastructure Capacity Building for West-African Professionals” (Date: 22nd – 28th May, 2011) Practical Demonstration on GIS in Land Suitability Mapping for Precision Farming by Enaruvbe, G.O.
  • 2. Goals of GIS in Precision Farming• Improve soil management techniques• Improve yield per hectare of farmland• Improve profit per farm input• Decision support for efficient management of farming input
  • 3. Goals of GIS in Precision Farming• GIS can also be applied in other aspects of farming – Precision fertilizer application – Productivity estimation – Monitoring crop diseases – Among many other areas
  • 4. Goals of GIS in Precision Farming• The goal of this presentation is to demonstrate the use of ArcGIS in soil suitability evaluation.• Available dataset include geo-referenced soil data• This is saved in a folder “soil25052011”on the desktop of your computer.
  • 5. Expected Result of this Exercise• At the end of this exercise, we should be able to identify areas that are suitable, moderately suitable and highly suitable for the production of crop ‘X` based on soil characteristics only
  • 6. Launch ArcGIS 9.xProgram| ArcGIS | ArcCatalog
  • 7. Launch ArcGIS 9.x
  • 8. Connect to Folder containing the dataFile | Connect folder | Navigate to “soil25052011” on the desktop
  • 9. Connect to Folder containing the dataFile | Connect folder | Navigate to “soil25052011” on the desktop
  • 10. Connect to Folder containing the dataFile | Connect folder | Navigate to “soil25052011” on the desktop
  • 11. Connect to Folder containing the data
  • 12. Lunch ArcMap Tools | ArcMap
  • 13. Launch ArcMap
  • 14. Lunch ArcMap OK
  • 15. Add DataFile | Add Data
  • 16. Add DataDouble click “sOIL PROP.xls”
  • 17. Add DataSelect Sheet$1 | Add
  • 18. Add Data Display XY DataRight-click the theme display on the TOC to the left and select Display XY Data
  • 19. Click Edit
  • 20. Click select…
  • 21. Double click Geographic Coordinate Systems
  • 22. Double click World
  • 23. Double Click WGS 1984.prj & click Ok until points are displayed on the ArcMap screen
  • 24. Add DataSelect sheet$1 Events
  • 25. Convert data from events to themeRight Click sheet$1 | Data | export data. This converts the sheet$1 event to shapefile
  • 26. The theme that appears now is a shapefile
  • 27. Raster Data InterpolationIn ToolsBox, 3D Analyst | Raster interpolation | Krigging (you can also use IDW)
  • 28. Double click Krigging
  • 29. Data InterpolationSelect shapefile theme ( not event) to interpolate e.g. Sample | for Z value pick the property of interest e.g. pH then OK
  • 30. Interpolated Surface Output is a surface interpolation of pH-Value
  • 31. Interpolated Surface• Repeat steps in slides 26-30 for all the properties you want to include as criteria in the suitability evaluation.
  • 32. Reclass soil Raster Reclass | Reclassify
  • 33. Data Classification Raster Reclass | Double click Reclassify
  • 34. Select Layer to Reclass Input raster select raster to reclass e.g. pH | Classify
  • 35. Data ClassifySelect input raster | Click Classify
  • 36. Classification method choose equal interval | classchoose the number of classes desired e.g. 3 then OK
  • 37. Classification method choose equal interval | classchoose the number of classes desired e.g. 3 then OK
  • 38. Output of reclass operation
  • 39. Reclass• Repeat steps in slides 32-38 to reclass all the criteria required
  • 40. Overlay Operation Raster Math | double click Plus
  • 41. Overlay OperationSelect reclassified criteria e.g. pH reclass and P reclass as two criteria for overlay
  • 42. • Repeat steps in slide 40 & 41, but always take the result of the last overlay operation as input 1 and any other criteria as input two.• Do this till you satisfy all criteria of interest e.g overlay of N, P, K and Yield• This means you keep increasing the criteria and you classes are likely to keep changing as you do that.•
  • 43. Label the ClassesRight click the reclass theme | open attribute table| Options | Add Events
  • 44. Name e.g. Classes| Type is text| OK
  • 45. Edit TableEditor | Start Editing. You may be prompted for the folder to edit. Choose the arcinfo workspace folder
  • 46. Identify ClassesDouble click on the cells under classes and type in Suitability classes e.g. Highly suitable, moderately suitable, suitable or not suitable,
  • 47. You now stop editing and close dialogue box
  • 48. Double Click Reclass on TOC| click symbology| unique values | select “classes” from drop down
  • 49. Soil Suitability Map Showing Classes
  • 50. THANK YOU!