[Qgis-user] Colour ramps - raster file extreme values
b.j.kobben at utwente.nl
b.j.kobben at utwente.nl
Sat Aug 22 10:19:32 PDT 2015
Look into "histogram stretch", this stretches colour values based on frequency.
Barend
--
Barend Köbben
Senior Lecturer - ITC-University of Twente
PO Box 217, 7500 AE Enschede (Netherlands)
@barendkobben
http://www.itc.nl/geoinformatics
On 21-08-15 17:48, "Lester Anderson" <arctica1963 at gmail.com<mailto:arctica1963 at gmail.com>> wrote:
Hi all,
I was wondering if anyone has advice for dealing with raster files that have a few small areas of extreme highs/lows (eg +200/-150), but the main data are much smaller values (+/- 25)?
Using a linear colour scheme, the extremes make the main areas of interest washed out to a great extent so the subtle features get lost. Couln't see any obvious route in v2.6
A way to adjust the curves, like in image processing or a log scale would be useful.
Cheers
Lester
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