Extracting Data

[Malcolm Williamson]

Hi,
check the ftp site "moon.cecer.army.mil", under the path 
pub/grass/grass4.1/documents . I believe it is the document called 
"mapcalc-algebra.ps.Z"

Regards,
--
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) 575-5218 
University of Arkansas              
Fayetteville, AR 72701

On Thu, 13 Jun 1996 bepperli at Papin.HRZ.Uni-Marburg.DE 
wrote:

> Hello everyone,
> I have to do some work on a 7.5 minutes DEM. Does anyone know how to extract 
> or calculate ridges, valleys, drainage divide, drainage channels, slope 
> curvature and slope shape ? And where can I get the book "r.mapcalc: An 
> algebra for GIS and Image Processing" by M. Shapiro and J. Westervelt? 
> 
> 
> Thank you in advance.
> 
> J. Bepperling
> bepperli at mailer.uni-marburg.de
> 
>