ewce09.azraftaohid.me/L4T1/EWCE 464/TUTORIAL 04_SPATIAL ANALYSIS/C02 - Class notes.md

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Model Builder

• Use data of "TUTORIAL 04_SPATIAL ANALYSIS"
• Elevation -> Slope Tool -> Slope -> Reclass -> 10 Classes -> Overlay
• Existing schools -> Far
• rec_sites -> near
• landuse

Procedure

Setup

• Add all data except destination
• Create a new Toolbox under the output folder (not within geodatabase)
• Toolbox -> New -> Model
• Model > Model Properties > General:
  • Name = SCHOOL; no space or underscore
  • Label = Find Site for Schools
• Model > Model Properties > Environments:
  • Check: Processing Extent > Extent
  • Open "Values"
  • Extent = Same as layer elevation
  • Check: Raster Analysis > Cell Size
  • Open "Values"
  • Cell Size = Same as layer elevation
  • Apply

Modelling

• Drag and add "elevation" from "Layers" into the builder
• Add "schools" and "rec_sites"; either drag similarly or insert
• Open "Add Data or Tool"
• Click "Home", "Up One Level" > Toolboxes > System Toolboxes
• Add Spatial Analyst Tools > Surface > Slope
• From "ArcToolbox", Spatial Analyst Tools > Distance > Euclidean Distance
• Copy paste the Euclidean Distance tool

Connect

• Use "Connect" to connect "elevation" with "slope"
• Click on "elevation" then "slope"; choose Input Raster
• Similarly connect "schools" with "Euclidean Distance"
• Similarly connect "rec_sites" with "Euclidean Distance (2)"

Run Elevation

• Right click into "Slope" > Open:
  • Select appropriate "Output raster"
  • Use "Z unit" = 0.3048
• Right click into "Slope (2)" > Add to Display
• Right click into "Slope" > Run

Run Schools

• Right click into "Euclidean Distance" > Open:
  • Select appropriate output
• Right click into "EucDist_School" > Add to Display
• Right click into "Euclidean Distance" > Run

Run Rec Sites

• Right click into "Euclidean Distance (2)" > Open:
  • Select appropriate output
• Right click into "EucDist_RecSites" > Add to Display
• Right click into "Euclidean Distance (2)" > Run

Reclassify

• Add Reclassify tool from ArcToolbox
• Connect "Slope (2)" with "Reclassify"
• Right click into "Reclassify" > Open
  • Classify with 10 equal intervals
  • Reverse
  • Choose appropriate output name
• Right click into "Reclass_Slope" > Add to Display
• Right click into "Reclassify" > Run
• Do the same for other to; do not reverse for "schools"

Overlay

• Add "Weighted Overlay" from ArcToolbox
• Connect all three reclassify outputs with this weighted overlay
• Right click into "Weighted Overlay" > Open:
  • From = 1, To = 10, By = 1; be sure to fix scale values if order is not right
  • For "Reclass_Slope" > Scale Value, set 1 through 3 as Restricted
  • Click "+" > Input Raster = "landuse"; Input Field = "LANDUSE"
  • Set scale value for landuse from manual
  • Set "% Influence" from manual
• Right click into "Weighted" > Add to Display
• Right click into "Weighted Overlay" > Run then close

Filter "9"

• Add "Con" from ArcToolbox
• Open:
  • Input = Weighted
  • Expression = Value = 9
  • True raster = "Weighted
  • Set suitable output name
• Add to Display
• Run

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Note: To reopen the model buildier, right click into the file then edit