Why is r.slope.aspect giving aspect as degrees from East?
Is not the standard degrees from N (terrain azimut)?
Agus
Dr. Agustin Lobo
Instituto de Ciencias de la Tierra (CSIC)
Lluis Sole Sabaris s/n
08028 Barcelona SPAIN
tel 34 93409 5410
fax 34 93411 0012
alobo@ija.csic.es
http://pangea.ija.csic.es/alobo
Agustin Lobo wrote:
Why is r.slope.aspect giving aspect as degrees from East?
Is not the standard degrees from N (terrain azimut)?
Perhaps because if you then use it in an aspect grey scale it looks
similar to viewing the land from above at sunrise? You could not easily
imagine this if it was from the north. The translation is surely
trivial using r.mapcalc.
--
James Cameron (cameron@stl.dec.com)
OpenVMS, Linux, Firewalls, Software Engineering, CGI, HTTP, X, C, FORTH,
COBOL, BASIC, DCL, csh, bash, ksh, sh, Electronics, Microcontrollers,
Disability Engineering, Netrek, Bicycles, Pedant, Farming, Home Control,
Remote Area Power, Greek Scholar, Tenor Vocalist, Church Sound, Husband.
"Specialisation is for insects." -- Robert Heinlein.