Download Using ArcGIS Spatial Analyst

Use the Raster Calculator to
perform mathematical functions
on your data.
The example used in the task is
Exp.
Use the following syntax when
using raster layers from the
Layers list (those layers you
added to ArcMap):
Exp([Density])
If you have not added the raster
dataset you wish to use as a
raster layer to ArcMap, it will
not appear as a layer in the
Layers list. If the raster dataset
is a grid, you can specify the
path to the grid dataset on disk:
Exp(c:\data\Density)
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Using the Raster
Calculator to perform
mathematical functions
on your data
1. Click the Spatial Analyst
dropdown arrow and click
Raster Calculator.
2. Click the Expansion button to
expand the Raster Calculator
and reveal the mathematical
functions.
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3. Click the function you want to
use.
4. Double-click the layer to
which you want to apply the
function.
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5. Click Evaluate.
Tip
Expanding the expression
box
Click and drag the bottom of the
Raster Calculator dialog box to
expand the expression box.
See Also
For more information on Map
Algebra syntax and rules, see
Appendix A. For supported
operators and precedence values,
see Appendix B.
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See Also
Click About Building Expressions
to access help for the Raster
Calculator, including the Spatial
Analyst functional reference.
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USING ARCGIS SPATIAL ANALYST