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GRASS GRASS user
1

Newsgroups: info.grass.user
Path: zorro.cecer.army.mil!shapiro
From: shapiro@zorro.cecer.army.mil (Michael Shapiro)
Subject: Re: Sites `n' Stuff
Message-ID: <C9G16J.1nL@news.cecer.army.mil>
Sender: news@news.cecer.army.mil (Net.Noise owner)
Organization: US Army Corps of Engineers Construction Engineering Research Labs
References: <9306220117.AA26271@cast.uark.edu>
Date: Wed, 30 Jun 1993 16:44:43 GMT
Lines: 39

In <9306220117.AA26271@cast.uark.edu> dgc@cast.uark.edu (Don Catanzaro) writes:

Netters,

I've been using site files and GRASS for awhile and I've run into a
couple of questions and comments. The first is that I'm not to sure how
g.region sites=name works. According to the manual, it will

Set the current region to the smallest region encompassing all coordinates
in the named site_lists file, aligned with the current region.

The part I'm fuzzy on is the aligned part. It seems as if the final region that
you get when you run this program changes as your current region changes. Any
suggestions ?

Alignment is a raster-ism. The region not only specifes the edges but also
the grid cell size. The grid-cell size implies a grid that runs along the
edges of the cells. Aligning the resulting region to the current region means
that the grid postin and spacing will not be changed. The edges will only
will be reset to the nearest grid line.

The second question/comment I have is that I wish to see how my sites
overlay onto different raster maps, ie what categories are the same coordinates
Is the only way to do this to convert my site_lists to a raster map or am I
missing something ? I could run d.what.rast (or vect) and click on each site
but I have over 900 sites and that would be slightly tedious, is there a quick
and dirty way to over come this problem ?

Use r.what: s.out.ascii | r.what

Thanks for any help...
      Don Catanzaro
      dgc@CAST.uark.edu
      Dept. of Biological Sciences
      University of Arkansas
      Fayetteville, AR 72701

--
Michael Shapiro shapiro@zorro.cecer.army.mil
U.S. Army CERL (217) 373-7277
P.O. Box 9005
Champaign, Ill. 61826-9005