[GRASS-user] How to get the mean of overlaping areas between rasters.

[Helmut Kudrnovsky]

M. wrote
> Dear all,
> 
> I want to sum 13 raster maps, and calculate the mean of areas which
> overlap
> among them. I mean, sum all the maps, but in those areas which they
> overlap
> calculate the mean of the values.
> 
> Does anybody know a method to do it?
> 
> Thanks for the attention,

hope to understand it right, so maybe

https://grass.osgeo.org/grass73/manuals/r.series.html

r.series - Makes each output cell value a function of the values assigned to
the corresponding cells in the input raster map layers. 

 Following methods are available:

    average: average value
    count: count of non-NULL cells
    median: median value
    mode: most frequently occurring value
    minimum: lowest value
    maximum: highest value
    range: range of values (max - min)
    stddev: standard deviation
    sum: sum of values
    variance: statistical variance
    diversity: number of different values
    slope: linear regression slope
    offset: linear regression offset
    detcoeff: linear regression coefficient of determination
    tvalue: linear regression t-value
    min_raster: raster map number with the minimum time-series value
    max_raster: raster map number with the maximum time-series value 

HTH




-----
best regards
Helmut
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