[GRASS-user] Linking raster map instead of copying - alternative
Rainer M Krug
r.m.krug at gmail.com
Thu Oct 13 10:01:58 EDT 2011
On Thu, Oct 13, 2011 at 3:49 PM, Hamish <hamish_b at yahoo.com> wrote:
> Rainer wrote:
> > I want to be able to acess the same raster map
> > by using two different names, e.g. "map_2007" and
> > "map".
> > Is there a way of achieving this (under Linux)? I
> > am using r.copy at the moment, but it uses quite
> > a bit of hdd space (I have many maps!). I could
> > use r.reclass,
> > r.reclass input=map_2007 output=map rules=???
> put in a file, or read from stdin:
> * = *
> note r.reclass is only intended to work with CELL
> (categorical) maps.
that might be a problem in my case.
> > In addition, would r.reclass be dynamic, i.e. if
> > map_2007 is changing, will that be reflected when
> > I access map?
> yes, although only categories present when the
> original r.reclass command was run would be
> considered. (e.g. if the range expands the reclass
> table won't know about that)
would this be a problem if I use "* = "?
> alternatively, you might try a big pile of symlinks.
> (probably much easier for vector maps)
I think I'll go that way - I just thought there would be a solution
So which files would I need to symlink? Asked otherwise: in which
directories *can* be raster map related files?
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology,
UCT), Dipl. Phys. (Germany)
Centre of Excellence for Invasion Biology
Tel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax (F): +33 - (0)9 58 10 27 44
Fax (D): +49 - (0)3 21 21 25 22 44
email: Rainer at krugs.de
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