Here is an example, using a SLD document, where polygon fill colour is based on a numeric feature attribute... http://docs.geoserver.org/stable/en/user/styling/sld-cookbook/polygons.html#attribute-based-polygon
You can do the same thing programatically as well. See the Map Style tutorial for an introduction to programmatic vs SLD doc styling. For more flexibility, you can combine a SLD doc with the "env" function which allows for parameter substitution. This is explained with an example here: http://docs.geoserver.org/stable/en/user/styling/sld-extensions/substitution.html In GeoTools the env function is implemented with this class: http://docs.geotools.org/latest/javadocs/org/geotools/filter/function/EnvFunction.html Hope that helps. Michael On 16 February 2012 11:42, Rakshit Majithiya <[email protected]> wrote: > Hi ! > Thanks ! > Actually my goal is to implement the coloring different polygons according > to their features.. > > I couldn't find this tutorial in the new version. Where can I find the > definition of UniqueColor function ? > I am sorry, I am not very much familiar with this API.. > > waiting to hear for more light. > ________________________________ > Best regards, > Rakshit Majithiya > Techno geek, Web Developer,Code Lover > email : [email protected] > blog : http://thetechtime.com > skype : rakshit.majithiya > > ________________________________ > From: Jody Garnett <[email protected]> > To: Rakshit Majithiya <[email protected]> > Cc: [email protected] > Sent: Thursday, 16 February 2012 1:16 AM > Subject: Re: [Geotools-gt2-users] Style Function Lab not working ! > > I thought UniqueColor function was a really hacky way to get a result used > in the earlier tutorial. The new style function lab did a much better job of > just updating the filter used (in a new layer used to draw the selection). > > Have a look at the tutorial again; it is much changed as the gt-swing module > has been cleaned up for version 8.0. > > -- > Jody Garnett > > On Wednesday, 15 February 2012 at 4:54 PM, Rakshit Majithiya wrote: > > > hello all ! > I'm new to geotools. . . > > I think this issue may be well known issue. . But we're really looking for > the solution seriously . . > > When we try to run the stylefunctionlab example provided with api, it can't > find the function named UniqueColor. > And it throws a lot of exceptions. . > It only works in api with version 2.6.3 but we want to use this function in > version 8.0. . > Is there any way to do so ?? > > It's very much urgently required to get this working. . . > > Thanks, > > ------------------------------------------------------------------------------ > Virtualization & Cloud Management Using Capacity Planning > Cloud computing makes use of virtualization - but cloud computing > also focuses on allowing computing to be delivered as a service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _______________________________________________ > GeoTools-GT2-Users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > > > > > > ------------------------------------------------------------------------------ > Virtualization & Cloud Management Using Capacity Planning > Cloud computing makes use of virtualization - but cloud computing > also focuses on allowing computing to be delivered as a service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _______________________________________________ > GeoTools-GT2-Users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ GeoTools-GT2-Users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
