Wind and current
malcolm at cast.uark.edu
Fri Jul 1 10:01:09 EDT 1994
> Now, I'm doing search and rescue of vessel at sea.
> A analysis got under way and the other two wind and current rate about vessel.
> Does anyone know how can GRASS store the rate of wind and current in vector map.
> and, Does GRASS express in raster map ?
> Thanks for your help and suggestion.
Analysis in GRASS is almost always done in the raster format. Refer to the
GRASS4.1 Users' Reference Manual - r.mapcalc entry (available online
using g.manual). Pay special attention to the spatial operator.
R.MAPCALC - An Algebra for GIS and Image Processing (available by
ftp'ing moon.cecer.army.mil - get /grass/grass4.1/documents/mapcalc-
_Geographic Information Systems and Cartographic Modeling_ ,
by C. Dana Tomlin (1990, Prentice-Hall) (although this book doesn't
refer directly to GRASS, it is probably the definitive work on
raster-based GIS analysis).
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
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