GRASS 4.0 Map Digitizing User's Manual: V. Digit

The Geographic Resources Analysis Support System GRASS is an image- processing and geographic information system GIS originally designed to serve land managers and environmental planners at An-ny installations, but now used by a wide variety of public and private users. Map data are useful for building a GIS data base. Within the GRASS system, map development entails the production of vector, raster, and support files to represent map features. One way analog map data are entered and converted into digital form is by tracing relevant map features with an electronic instrument called a digitizer. In GRASS version 4.0, the program used to conduct this conversion is called v.digit. This manual discusses v.digit options. The v.digit program is an interactive, menu-driven vector digitizing, labeling, and editing package. The samples in this manual require use of a workstation minimally consisting of a graphics monitor and keyboard, a pointing device mouse, and a digitizing tablet. Drivers for v. digit exist for Altek,