[GRASS-user] using r.mapcalc on a 100 rasters to produce one output (a temporal set of rasters)

[Nikos Alexandris]

m k wrote:

> My apologies if this is a repeat post, but i think my question did not get
> delivered last try. (I'm new here!) I am looking for a way for GRASS to do
> create one output raster based on the analysis of say 100 rasters (same
> spatial coordanates, but each raster has an equal time interval between
> them). For example if I have 100 rasters that have only 0's and 1's, and I
> want to calculate an output raster that shows how long it took each cell
> to first acquire a value of 1. Another example: sums up all 100 rasters to
> one output raster.
> 
> >From what I've gathered, I think that r.mapcalc will do the necessary
> >functions, but I cannot find an example where it is processing 100s of
> >rasters in a temporal set.Am I correct in assuming that r.mapcalc is the
> >best solution for my problem? Are there other functions I should know
> >about? Is there any examples that are similar to my problem?

You can use "r.mapcalc" to achieve (almost) everything. Yet, for time-series, 
you can use the module "r.series".

Have also a look at <http://grass.osgeo.org/wiki/Time_series>

Regards, Nikos