Lorenzo, It would be good to discuss this in real time. My contact details are at http://cameron.shorter.net
I have a bunch of questions: * What will your interface between client and server look like? * I don't know much about the algorithms mentioned below, but I'm guessing they require attribute Max/min and statistical calculations from a collection of features? * I wonder how a WFS interface would need to be extended to support this and whether it is worth standardising as a spec. * The SLD spec has had a slow uptake and I wonder whether your needs might highlight deficiencies. I'm assuming that you plan to have a browser based client (Openlayers) which would need an interface to a server (eg Geoserver). Lorenzo Becchi wrote: > >> Lorenzo, >> You have sparked my curiosity. Maybe you have identified a user >> requirement which is not covered by OGC specifications. >> >> I'm wondering whether your requirements could be addressed by a WFS >> or Web Coverage Service (WCS). >> A WCS can be used to colour a map based on an attribute like >> population density. > We didn't felt that confortable looking for a OWS solution for: > - quantile > - unique value > - natural brakes > - generally every algorithm to create classes passing from real data > values. > > The problem we see is not the possibility to access data values with > OWS but to parse them on the client (Web Browser) to build the brake > values and use them in SLD filters. > > we are open to any suggestions to do a better job but actually we see > a solution only in this server component. > > > ciao > Lorenzo and Andrea > -- Cameron Shorter Systems Architect, http://lisasoft.com.au Tel: +61 (0)2 8570 5050 Mob: +61 (0)419 142 254 _______________________________________________ Dev mailing list [email protected] http://openlayers.org/mailman/listinfo/dev
