--- Helena Mitasova <[EMAIL PROTECTED]> wrote:
> Eric Patton wrote: > > I was updating the r.colors docs, as the given rules in the html > > are out of sync with the program. > > I'm not sure how to describe some of the canned rules, particularly > > curvature and evi. > > > > Anyone know what these color tables were intended to map? Helena: > curvature is for terrain curvatures (based on the color table that > you get for curvatures > from v.surf.rst and r.slope.aspect), something like this > http://skagit.meas.ncsu.edu/~helena/wrriwork/lakewh/honpc.jpg > http://www.grassbook.org/gallery/chapters/s060806f010_pcurv.jpg > http://www.grassbook.org/gallery/chapters/s0609f020_topoanal.jpg > > negative values are blues, positive values are yellow to red (I will > double check that to make sure). > Generally it is useful for maps that have both positive > and negative values. see also r.colors.stddev from the wiki addons page. To me it is a very interesting module for setting color tables for difference maps etc. > I don't know about evi, It is enhanced vegetation index from eg MODIS data like NDVI. see http://earthobservatory.nasa.gov/Library/MeasuringVegetation/ Hamish ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping _______________________________________________ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
