# GRASS Help System

## DEFINING THE GEOGRAPHIC REGION

To create a new GRASS location, you must supply the following information:

1. The coordinate system for the database

x,y (for imagery and other unreferenced data)
UTM
State Plane
Latitude-Longitude (Lat-Long)
2. The zone for the database (except for x,y and Lat-Long databases) 3. The coordinates of the area to become the default region and the grid
resolution of this region
4. A short, one-line description or title for the location

The user is asked to define default geographic region settings. This information will be saved in a special file named "DEFAULT_WIND" and stored under the "PERMANENT" mapset under the new location. Any mapset stored under this location will default to use of the geographic boundaries and cell resolutions shown in the "DEFAULT_WIND" file IF the mapset does not contain a file called "WIND" with these settings. These geographic boundaries should be large enough to encompass all of the data the user wishes to store under this location.

The user can modify the WIND file containing these settings under his own mapset later, in GRASS, as needed, using the g.region command.

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Automatically created on: Sat Jan 8 06:50:25 2005