# GRASS Help System

## PROXIMITY ANALYSIS

GRASS can be used to examine the proximity of certain map categories from others. Often, this is useful when determining which geographic areas warrant further analysis. For example, if investigating potential nesting sites of species X, the user might restrict his analysis to areas within a 300-meter radius of cells containing relevant species habitat.

The "r.buffer" program allows the user to establish buffer zones around cells with non-zero category values. The "r.reclass" program can be run prior to "r.buffer" to identify particular cell values of interest.

- r.buffer - r.reclass

For more information on a specific command, select a command and press ESC.

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Automatically created on: Sat Jan 8 06:50:27 2005