Land Use/Land Cover Detection

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Land Use/Land Cover Detection

  1. 1. 2/22/2012 Land Use/Land Cover Change Detection GIS in Health and Planning 2012 Spring Rutgers University by Wansoo Im, Ph.D.
  2. 2. DOWNLOAD MUNICIPAL BOUNDARY HTTP://NJGIN.STATE.NJ.US
  3. 3. DOWNLAOD -> DON’T FORGET TO EXTRACT FILES!
  4. 4. WATERSHED DATA DOWNLOAD WWW.STATE.NJ.US/DEP/GIS
  5. 5. SELECT YEAR OF DATA->CLICK “CONTINUE”
  6. 6. CHECK THE LOCATION MAP OF WATERSHED BEFORE DOWNLOADING THE FILE <ul><li>- What is watershed? </li></ul>
  7. 7. DOWNLOAD THE SHAPEFILE
  8. 8. DON’T FORGET TO EXTRACT FILES AGAIN.
  9. 9. ADD MUNICIPAL BOUNDARY AND WATERSHED SHAPEFILES
  10. 10. OPEN THE ATTRIBUTE TABLE OF LAND USE (WATERSHED) LAYER <ul><li>-Change the color of municipality layer to “No color(Transparent)” </li></ul><ul><li>- Change the color of Municipality boundary to distinguish that of a watershed layer, for example, to “red color” </li></ul>
  11. 11. CHECK IF THE FIELD CONSISTS OF NOMINAL VARIABLES OR NOT(ORDINAL/NUMERIC?...) <ul><li>(ex) Field Type02 -> Urban/Forest… -> Nominal variable)-> Maps by Categories </li></ul>
  12. 12. CLICK THE FIELD YOU WANT TO MAP
  13. 13. CLICK “ADD ALL VALUES”
  14. 14. COLOR ARRANGEMENT FOR LAND USE <ul><li>http://www.metrogis.org/data/info_needs/existing_land_use/codescheme.pdf </li></ul>
  15. 15. LAND USE COLOR PALLETE (LBCS STANDARD) HTTP://WWW.PLANNING.ORG/LBCS/STANDARDS/
  16. 16. <EXTRACT THE SELECTED FEATURE>
  17. 17. OPEN ATTRIBUTE TABLE FROM A MUNICIPAL LAYER -> SELECT THE FEATURE
  18. 18. “ NEW BRUNSWICK” IS SELECTED (HIGHLIGHTED BY BLUE COLOR OF BOUNDARY)
  19. 19. EXPORT THE SELECTED FEATURE
  20. 20. SAVE THE SELECTED FEATURE(EX)NEW BRUNSWICK) AS A SHAPEFILE.
  21. 21. NEWLY-CREATED “NEWBRUNS WICK LAYER(NB)”
  22. 22. CLIP <ul><li>Geo processing->clip->set the right directory(a location where you want to save a file) </li></ul><ul><li>Cookie dough (input feature) : Watershed layer (Land Use layer) </li></ul><ul><li>Cookie cutter(Clip feature) : New Brunswick layer (the one you exported from municipal boundary layer) </li></ul><ul><li>(The data in attribute table which is contained in Watershed layer(Land Use layer) will be conveyed to the newly clipped layer after you clip watershed layer with New Brunswick layer) </li></ul>
  23. 23. CLIP
  24. 24. SELECT THE DIRECTORY (LOCATION WHERE YOU SAVE THE FILE)
  25. 25. INPUT FEATURE(WATERSHED LAYER)/OUTPUT FEATURE(NEW BRUNSWICK LAYER) AND CLICK “OK”
  26. 26. NEXT STEP : NEW BRUNSWICK LAND USE CHANGE <ul><li>Export Land Use Layer(watershed layer) with the boundary of New brunswick boundary layer from municipal boundary layer by “Clip tool” </li></ul><ul><li>2. Within clipped-New Brunswick Land use layer(watershed layer), select the land use change area (Field Name : CHANGE07) by using “Select by attribute “ </li></ul><ul><li>Fomulas : “CHANGE07”=1 </li></ul><ul><li>Right click on the layer of NB land use and export the feature as a shapefile while selection on the land use change is activated, then you will get the map of land use change in 2007 WITHIN New Brunswick. </li></ul><ul><li>3. In this exported map(Land Use Change07 within NB), we want to check how many residential areas are included. </li></ul><ul><li>Open Attribute table, and Sorting data by clicking the field of Land use by dragging individual cases in “the attribute table” – Use Sorting function in the attribute table – </li></ul><ul><li>4. Calculate the Acres of selected features : Open the attribute table –select the variables/cases/features that you want to calcuate – Right click on the ‘ACRES” field – Click “Statistics ” </li></ul>
  27. 27. SELECT BY ATTRIBUTE
  28. 29. FIELD “CHANGE07” = 1 <ul><li>Land use change occurred in 2007 : CHANGE07 = 1 </li></ul><ul><li>No land use change in 2007 : CHANGE07=0 </li></ul>
  29. 30. EXPORT THIS SELECTED LAND USE CHANGE AREAS
  30. 31. SELECT RESIDENTIAL AREA WITHIN LAND USE CHANGE FEATURES. <ul><li>Click the layer for land use change that you just exported-> Open attribute table -> sort -> drag (select the all residential area) -> export a data again. </li></ul>
  31. 32. SELECT RESIDENTIAL AREA IN THE ATTRIBUTE TABLE.
  32. 33. OUTCOME
  33. 34. CALCULATE ACRES : <ul><li>1. Select the cases that you want to calculate </li></ul><ul><li>2. Right click Acres – go to “statistics” </li></ul><ul><li>3. Information available </li></ul><ul><li>Counts (Number of cases you chose) </li></ul><ul><li>Sum / Minimum/Maximum/Standard deviation/… </li></ul>
  34. 35. STATISTICS
  35. 36. EXAMPLE OF LAND USE CHANGE ANALYSIS <ul><li>Land use change around Raritan river waterbody – related to contamination. </li></ul><ul><li>1. Clip certain area of interests </li></ul><ul><li>2. buffer the river </li></ul><ul><li>< Applications > </li></ul><ul><li>- Mapping Land use change within municipalities </li></ul><ul><li>- The impact of Municipal policies on Land use, </li></ul><ul><li>- The analysis of land preservation – its comparison with other municipalities and so on </li></ul>

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