vector length

[Malcolm Williamson]

> We have vector files representing tributaries to a river.
> Is there a command in GRASS4.0 or 
> 4.1 that will give me the vector length of either 1) each category
> in a file or 2) the whole vector file?
> 
> Background:  The vector files are dlg stream data which are imported into
> GRASS4.0.  We can use v.digit to either categorize all the tributaries in 
> each file  by
> stream order (in which case we'd like to use choice #1, above)
> OR we can create files containing only the first order tributaries, 
> then create a file containing only the 2d order tributaries, etc (in which 
> case we'd like to use choice #2, above).
> 
> Thanks in advance for all help!
> -Nancy
>  

There is a wonderful program called v.report, found under src.contrib/SCS/vector
in GRASS4.1. It reports on length of vectors, areas of polygons, and number of
sites in GRASS vector layers. Good stuff (reason enough to get 4.1!!) (along
with v.reclass!).

-- 
Malcolm D. Williamson - Research Assistant       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