Hi, it would be ideal to have a new threshold/count method in r.series. Example: I am calculating growing degree days (accumulated temperatures over one year, [1]) and want to know at which day of year (count) this happens. Input would be 365 growing degree days maps, parameters a threshold value (e.g. 440 for insect moulting) and the result a count value per pixel which corresponds to the map number which I gave as input (which is the day of year DOY in this case).
Would that be hard to implement? A bit of rounding/epsilon will be involved to match the requested threshold since the input maps are typically FP maps. I can imagine more use cases: first frost day in autumn (theshold -0.1°C or so), input daily minimum temperature maps and more... Markus [1] http://en.wikipedia.org/wiki/Growing_degree_day _______________________________________________ grass-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-dev
