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Hello Grasshoppers,

	I was curious if anyone had a reference for the mapcalc statement
used in the shade.rel.sh.  I have found in the article "R.Mapcalc; an algebra
for GIS and Image Processing" some references for the slope and aspect maps
(which are used in shade.rel.sh) but nothing for some of the other steps in
the eval statement.

	Any help would be greatly apprecieated.

		Don Catanzaro
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							|
Don Catanzaro						|Phone: (501)-575-6159
Arkansas Cooperative Fish & Wildlife Research Unit	|Fax:   (501)-575-3846
University of Arkansas                                  |e-mail:  
Fayetteville, Arkansas  72701                           |    dgc@CAST.uark.edu

	"Part of working for a living is working for a world to live in"
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