[GRASS-user] Multiple labels and r.series

Nikos Alexandris nikos.alexandris at felis.uni-freiburg.de
Tue Nov 11 16:48:18 EST 2008


On Tue, 2008-11-11 at 11:03 -0800, John C. Tull wrote:
> Dear GRASS Users:
> 
> 
> I am creating a raster map that essentially summarizes the
> intersection of a series of labeled rasters that each have values of
> either 1 or null (presence/absence data). I am using r.series like
> this to perform the summation across the rasters that are all named
> with a prefix of presence_:
> 
> 
> r.series input="`g.mlist rast pattern='presence_*' sep=,`"
> output=presence_sum method=sum --o
> 
> 
> Can anyone think of a way to achieve this summation of intersections
> in a way that will also allow for each cell to have a label that
> concatenates all labels for the respective raster maps that are
> present at that cell? E.g., let's say three of the rasters are present
> at a particular cell, and the labels for those rasters are 'raster1',
> 'raster4', and 'raster7'. I would like the final map to have a label
> of 'raster1, raster4, raster7'.
> 
> 
> Any and all suggestions are greatly appreciated.
> 
> 
> Regards,
> John

John,

I don't have a solution really. I am also interested in this. My general
idea was to export labels from each raster of interest, create some
table (csv), import back and attach to the "final" raster... if this is
possible.

But it would be nice to know how to do what you ask. 

Regards, Nikos



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