GIS@Grinnell : Training

How do I create cost-distance buffers?

• Click the "Spatial Analyst" dropdown arrow, point to "Distance", and click "Cost Weighted".
• Click the "Distance to" dropdown arrow and click the source layer.
• Click the "Cost raster" dropdown arrow and click the raster to use.
• Optionally, specify a Maximum distance. Cells outside this distance will be given the value of NoData.
• Specify an output cell size for the result.
• Optionally, check "Create direction" to create a direction raster (required for using the Shortest Path function).
• Optionally, check "Create allocation" to create an Allocation raster.
• Type a name for each result or leave the default to create a temporary result.
• Click OK.
• Note: Click "Options" on the "Spatial Analyst" toolbar to set up your working directory, extent, and cell size for your analysis results.
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• To create the buffers:
• Click the "Spatial Analyst" dropdown arrow and click "Reclassify".
• Click the "Input raster" dropdown arrow and click the raster with values you wish to reclassify.
• Click the "Reclass field" dropdown arrow and click the field you wish to use.
• To set buffer sizes either enter them by hand in the "Old values/New values" table or Click the "Classify" button.
• If you click the "Classify" button:
• Click the "Method" dropdown arrow and choose a classification method to use to reclassify your input data.
• Click the "Classes" dropdown arrow and choose the number of classes into which your input data will be split.
• Click OK.
• Modify the "New values" for your output raster if appropriate.
• Specify a name for the output or leave the default to create a temporary dataset in your working directory.
• Click "OK" on the Reclassify dialog box.

Tabulate Areas of Two Interecting Grids

• Use TabulateArea ArcScript (See Install TabulateArea Arcscript)
• Create new Map Project.
• Add only the two raster layers you want to cross tabulate.
• Select TabulateArea button (it is located wherever you put it when you install the TabulateArea Arcscript).
• Fill in fields in dialog box.
• Select OK.
• The Output table will be saved to the temp folder: Usually something like c:\temp or c:\Documents and Settings\[Your Account Login Name]\Local Settings\Temp
• Or use search for a file called "tabarea*.dbf"
• NOTE: The two layers must be integer rasters.
• NOTE: The first layer (Zone Dataset) will be the rows.
• NOTE: The second layer (Value Raster) will be the columns.
• NOTE: The area calculation will be in the Layer Framset units.