Spatial Analyst Tutorial

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Spatial Analyst Tutorial
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Preparation

• Copy the spatial folder from \\cahe9345\classda
  ta\soils468\data to your own data folder.

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Hillshade

• Creates a shaded relief raster from an elevation
  raster and an illumination source.
• Combined with transparency, it gives a map a 3
  dimensional appearance.

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Histogram

• Very useful to get a quick measure of how raster
  data is distributed.

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Finding a new school site in Stowe, Vermont

1. Input Datasets
2. Derive Datasets
3. Reclassify Datasets
4. Weight and combine datasets

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Deriving slope

• In ArcGIS slope may be calculated as degrees or
  as percent.
• Be aware of the horizontal and vertical units of
  your datasets reproject or calculate a z-factor
  if necessary.

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Straight line (Euclidean) Distance
Recreation sites
Existing schools
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Reclassify

• Replace values based on new information.
• Group certain values together
• Reclassify values to a common scale
• Convert cells to No Data or assign values to No
  Data cells.

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Reclassify
Recreation sites
Existing schools
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Weight and combine datasets
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Cost path analysis

• Calculates the cost of moving across a raster
  surface based on geographic factors.
• Requires a source dataset, a cost dataset, and a
  destination dataset.

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Cost path analysis
Reclassify input datasets
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Cost path analysis