Land Use/Land Cover Detection
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Land Use/Land Cover Detection

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Land Use/Land Cover Detection Land Use/Land Cover Detection Presentation Transcript

  • 2/22/2012 Land Use/Land Cover Change Detection GIS in Health and Planning 2012 Spring Rutgers University by Wansoo Im, Ph.D.
  • DOWNLOAD MUNICIPAL BOUNDARY HTTP://NJGIN.STATE.NJ.US
  • DOWNLAOD -> DON’T FORGET TO EXTRACT FILES!
  • WATERSHED DATA DOWNLOAD WWW.STATE.NJ.US/DEP/GIS
  • SELECT YEAR OF DATA->CLICK “CONTINUE”
  • CHECK THE LOCATION MAP OF WATERSHED BEFORE DOWNLOADING THE FILE
    • - What is watershed?
  • DOWNLOAD THE SHAPEFILE
  • DON’T FORGET TO EXTRACT FILES AGAIN.
  • ADD MUNICIPAL BOUNDARY AND WATERSHED SHAPEFILES
  • OPEN THE ATTRIBUTE TABLE 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”
  • CHECK IF THE FIELD CONSISTS OF NOMINAL VARIABLES OR NOT(ORDINAL/NUMERIC?...)
    • (ex) Field Type02 -> Urban/Forest… -> Nominal variable)-> Maps by Categories
  • CLICK THE FIELD YOU WANT TO MAP
  • CLICK “ADD ALL VALUES”
  • COLOR ARRANGEMENT FOR LAND USE
    • http://www.metrogis.org/data/info_needs/existing_land_use/codescheme.pdf
  • LAND USE COLOR PALLETE (LBCS STANDARD) HTTP://WWW.PLANNING.ORG/LBCS/STANDARDS/
  • <EXTRACT THE SELECTED FEATURE>
  • OPEN ATTRIBUTE TABLE FROM A MUNICIPAL LAYER -> SELECT THE FEATURE
  • “ NEW BRUNSWICK” IS SELECTED (HIGHLIGHTED BY BLUE COLOR OF BOUNDARY)
  • EXPORT THE SELECTED FEATURE
  • SAVE THE SELECTED FEATURE(EX)NEW BRUNSWICK) AS A SHAPEFILE.
  • NEWLY-CREATED “NEWBRUNS WICK LAYER(NB)”
  • CLIP
    • Geo processing->clip->set the 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)
  • CLIP
  • SELECT THE DIRECTORY (LOCATION WHERE YOU SAVE THE FILE)
  • INPUT FEATURE(WATERSHED LAYER)/OUTPUT FEATURE(NEW BRUNSWICK LAYER) AND CLICK “OK”
  • 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 ”
  • SELECT BY ATTRIBUTE
  •  
  • FIELD “CHANGE07” = 1
    • Land use change occurred in 2007 : CHANGE07 = 1
    • No land use change in 2007 : CHANGE07=0
  • EXPORT THIS SELECTED LAND USE CHANGE AREAS
  • SELECT RESIDENTIAL AREA WITHIN 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.
  • SELECT RESIDENTIAL AREA IN THE ATTRIBUTE TABLE.
  • OUTCOME
  • 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/…
  • STATISTICS
  • EXAMPLE OF LAND USE 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