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Land Use/Land Cover Detection
- 1. 2/22/2012 Land Use/LandCover Change Detection GIS in Health and Planning 2012 Spring Rutgers University by Wansoo Im, Ph.D.
- 2. DOWNLOAD MUNICIPAL BOUNDARYHTTP://NJGIN.STATE.NJ.US
- 3. DOWNLAOD -> DON’TFORGET TO EXTRACT FILES!
- 4. WATERSHED DATA DOWNLOADWWW.STATE.NJ.US/DEP/GIS
- 5. SELECT YEAR OFDATA->CLICK “CONTINUE”
- 6. CHECK THE LOCATIONMAP OF WATERSHED BEFORE DOWNLOADING THE FILE - What is watershed?
- 7.
- 8. DON’T FORGET TOEXTRACT FILES AGAIN.
- 9. ADD MUNICIPAL BOUNDARYAND WATERSHED SHAPEFILES
- 10. OPEN THE ATTRIBUTETABLE OF LAND USE (WATERSHED) LAYER -Change the color of municipality layer to “No color(Transparent)” - Change the color of Municipality boundary to distinguish that of a watershed layer, for example, to “red color”
- 11. CHECK IF THEFIELD CONSISTS OF NOMINAL VARIABLES OR NOT(ORDINAL/NUMERIC?...) (ex) Field Type02 -> Urban/Forest… -> Nominal variable)-> Maps by Categories
- 12. CLICK THE FIELDYOU WANT TO MAP
- 13. CLICK “ADD ALLVALUES”
- 14. COLOR ARRANGEMENT FORLAND USE http://www.metrogis.org/data/info_needs/existing_land_use/codescheme.pdf
- 15. LAND USE COLORPALLETE (LBCS STANDARD) HTTP://WWW.PLANNING.ORG/LBCS/STANDARDS/
- 16. <EXTRACT THE SELECTEDFEATURE>
- 17. OPEN ATTRIBUTE TABLEFROM A MUNICIPAL LAYER -> SELECT THE FEATURE
- 18. “ NEW BRUNSWICK”IS SELECTED (HIGHLIGHTED BY BLUE COLOR OF BOUNDARY)
- 19. EXPORT THE SELECTEDFEATURE
- 20. SAVE THE SELECTEDFEATURE(EX)NEW BRUNSWICK) AS A SHAPEFILE.
- 21. NEWLY-CREATED “NEWBRUNS WICKLAYER(NB)”
- 22. CLIP Geo processing->clip->setthe right directory(a location where you want to save a file) Cookie dough (input feature) : Watershed layer (Land Use layer) Cookie cutter(Clip feature) : New Brunswick layer (the one you exported from municipal boundary layer) (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)
- 23.
- 24. SELECT THE DIRECTORY(LOCATION WHERE YOU SAVE THE FILE)
- 25. INPUT FEATURE(WATERSHED LAYER)/OUTPUTFEATURE(NEW BRUNSWICK LAYER) AND CLICK “OK”
- 26. NEXT STEP :NEW BRUNSWICK LAND USE CHANGE Export Land Use Layer(watershed layer) with the boundary of New brunswick boundary layer from municipal boundary layer by “Clip tool” 2. Within clipped-New Brunswick Land use layer(watershed layer), select the land use change area (Field Name : CHANGE07) by using “Select by attribute “ Fomulas : “CHANGE07”=1 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. 3. In this exported map(Land Use Change07 within NB), we want to check how many residential areas are included. 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 – 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 ”
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- 29. FIELD “CHANGE07” =1 Land use change occurred in 2007 : CHANGE07 = 1 No land use change in 2007 : CHANGE07=0
- 30. EXPORT THIS SELECTEDLAND USE CHANGE AREAS
- 31. SELECT RESIDENTIAL AREAWITHIN LAND USE CHANGE FEATURES. 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.
- 32. SELECT RESIDENTIAL AREA IN THE ATTRIBUTE TABLE.
- 33.
- 34. CALCULATE ACRES :1. Select the cases that you want to calculate 2. Right click Acres – go to “statistics” 3. Information available Counts (Number of cases you chose) Sum / Minimum/Maximum/Standard deviation/…
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- 36. EXAMPLE OF LANDUSE CHANGE ANALYSIS Land use change around Raritan river waterbody – related to contamination. 1. Clip certain area of interests 2. buffer the river < Applications > - Mapping Land use change within municipalities - The impact of Municipal policies on Land use, - The analysis of land preservation – its comparison with other municipalities and so on