# GRASS Help System

## NOTES ABOUT PATCHING: TO PATCH OR NOT TO PATCH?

Frequently, (due to the size of digitizing tablets) users digitize data in relatively small chunks which must be "patched" together before data are analyzed. The GRASS commands listed below can be used to edit and patch digital data. Prefixes denote whether commands operate on data in vector ("v.") or raster ("r.") file format. For a description of these formats, read the information contained in "Raster, Vector, and Sites Data File Formats," located back at this area's menu.

Commands commonly used in the patching process are:

- v.patch - r.patch
- v.prune - r.mapcalc
- v.spag

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

For a more thorough look at map development issues, examine the "Digitizing and Map Development" topic area, located back at the Help System Main Menu.

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Automatically created on: Wed Mar 30 04:38:58 2005