vector polygons

[Malcolm Williamson]

> 
> hi y'all,
> 
> i was wandering is there a way to convert a vector polygon drawn by the user
> on a "background" raster layer into a binary (1 on the inside, 0 on the outside)
> layer of its own?
> 
> this may be a simple question, i would like to know the answer before i plunge
> into the GRASSy knoll.
> 
> thanks
> 

In v.digit, label the vector polygon as category 1. Run v.support. Run
v.to.rast (be sure that your region has appropriate coordinates and resolution.
Remember, all raster operations are dependent on your current region!). Voila!

> *--------------------------------------------------------------------------*
> |  Rica Saporta  B.Sc.F     |              __  _-==-=_,-.                  |
> |  Faculty of Forestry      |             /--`' \_ at -@.--<                  |
> |  University of Toronto    |             `--'\ \   <___/.  "Cause         |
> |  33 Willcocks Street      |                  \ \\   ' /    tiggers  are  |
> |  Toronto, Canada          |                   >=\\_/`<       wonderfull  |
> |  M5S 3B3                  |       ____       /= |  \_|/         things"  |
> |  (416) 978-6152           |     _'    `\   _/=== \___/                   |
> |                           |                                              |
> |     >>   saporta at smokey.forestry.utoronto.ca     <<                      |
> *--------------------------------------------------------------------------*
> 


-- 
Malcolm D. Williamson - GIS Specialist           E-mail: malcolm at cast.uark.edu
Center for Advanced Spatial Technologies      Telephone: (501) 575-6159
Ozark Rm. 12                                        Fax: (501) 575-3846 
University of Arkansas              
Fayetteville, AR 72701