Yeah, I also tried that, and of course, I get a nice gradient in the legend, but then I need to somehow edit tick-marks. Logarithm of chlorophyll concentration is, from my point of view, uninformative. I need the actual values. I just want to change the display of the legend, like making log of x or y axis in a plot, that you do not change the values themselves, just rescale the axis for better visualization... but maybe not (yet) possible in GRASS ;)
Thanks much! Vero 2014-06-10 7:40 GMT-03:00 Daniel Victoria <[email protected]>: > What if you use r.mapcalc and apply log to your map to make a new one with > rescaled values? > On Jun 9, 2014 12:36 PM, "Veronica Andreo" <[email protected]> wrote: > >> Hi list! >> >> I have these raster maps of chlorophyll concentration (mg/m3) with a lot >> of very small values (from 0.02 to 1.5) and few high values (between 20 and >> 100)... I managed to create my own color table to get a good visualization >> of the variation... but when I display the legend, i loose the color >> variation in smaller values... >> >> Is it possible to create a logarithmic legend or at least determine which >> tick-marks I'm interested in?? I've tried with "use" parameter in d.legend >> (which seemed to meet my needs) setting it to: 0.01,0.1,1,10,100, but works >> only for categories... There's no such a thing in ps.map, either... which >> would be the right approach? any ideas? >> >> Thanks much in advance! >> Best, >> >> Vero >> >> _______________________________________________ >> grass-user mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/grass-user >> >
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