[GRASS-dev] r.series method=minimum yields float map when integer maps are used as input

Veronica Andreo veroandreo at gmail.com
Tue Aug 28 04:45:38 PDT 2018

Thanks for the explanation, Glynn :)

El mar., 28 ago. 2018 a las 11:01, Glynn Clements (<glynn at gclements.plus.com>)

> Veronica Andreo wrote:
> > If I use a series of integer type maps as input to t.rast.series or
> > r.series and select minimum as method, the output is a floating point
> map.
> > I would have thought that if the input are integers then output should be
> > integer as well. I realized when I made a plot of the map and got a
> smooth
> > legend instead of integer numbers.
> > Is this an expected behaviour?
> The type of the output map is independent of the inputs, determined
> solely by the method. The count, diversity, min_raster and max_raster
> methods generate integer maps; all other methods generate
> floating-point maps.
> It probably wouldn't be particularly involved to add another flag to
> the method table to indicate that a particular method will always
> produce an integer result for integer inputs.
> Also, the use of weights= forces the output to floating-point even if
> the method doesn't actually support the use of weights.
> --
> Glynn Clements <glynn at gclements.plus.com>
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