Andrea Aime ha scritto: > Andrea Aime ha scritto: > ... >> Again, not very useful... it's telling you that at the 33% break there >> is a 0, and by applying it, you'd get a class that ends with 0, and >> another that starts with 0. Which is something the layman using >> the application does not understand, it does not make sense to him. >> >> That's why I was suggesting to have the classes avoid breaks on >> flat areas.... so I'm back at square one... current method is >> mathematically sound, but does not make any sense to the normal >> user. What now? > > Well, since I have a customer that needs this, and there seems > to be no agreement (or lack of interest) on what to do, > I'll roll a custom variant of the quantile algorithm inside > GeoServer that does what I suggested, set apart the flat areas > of the histogram in their own classes when they are big enough (say, > half of a standard sized class?), and try to build classes > with the expected size for the rest of the values.
I also illustrate a possible post processing approach at http://www.nabble.com/sldService-patches-td17401397.html that would avoid messing with the classification functions altogether. Cheers Andrea ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Geotools-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
