Hi, what I am actually doing is producing a raster of values for each GetMap request. Thus, there are no fixed levels for the raster and the raster is constructed dynamically rather than being based on images.
Might it be better to implement my datastore as a raster store? best regards Andreas On 7/5/2013 5:18 PM, Andreas Wombacher wrote: > Hi, > > yes it is already available on github > https://github.com/utwente-db/neogeo > > but it is still pre-alpha as you can see on my questions. > > The basic idea is that often if you want to visualize a lot of > information in a GIS the layers get very slow. We suggest to have in > addition to the layer providing the features for each individual object > another layer where we present only aggregates. Thus, we put a grid over > the map with a configurable amount of cells and we display e.g. the > number of objects in a particular cell instead of all objects of that cell. > The idea is that the user can get this way an idea about the > distribution of the data in the current view of the map and zoom in on > the parts which are most interesting. Once the number of objects is > sufficiently small you switch on the detailed layer on again to observe > the objects. > Behind the datastore is an index we develop for aggregation queries, > which I am now trying to connect to geoserver. > > A small example of counts of tweets from London Haveringen is accessible > as WFS at > http://silo2.ewi.utwente.nl:8080/geoserver/nurc/wms > Please be aware that the getFeatureInfo request is not working yet - > apparently. > > Further this is my development server, thus, there is a good chance it > goes on and off on a regular basis. In a few weeks we will have a > production server and some bigger dataset and more features, which i > will share with you at the time. > > Thanks a lot for your help. > > best regards > Andreas > > On 7/5/2013 5:06 PM, Andrea Aime wrote: >> On Fri, Jul 5, 2013 at 4:49 PM, Andreas Wombacher >> <[email protected] <mailto:[email protected]>> wrote: >> >> Hi, >> >> I am building a new datastore, which presents aggregated features on the >> map. In hte meanwhile it works reasonable for getMap requests. However, >> if my datastore receives a getFeatureInfo request the BBox contained in >> the filter of the query corresponds to the area around the mouse >> pointer. >> >> However, to be able to answer the request I need the information of the >> BBox of the map. I see this information in the geoserver log >> >> GetMapRequest = >> GetMap Request >> version: 1.1.1 >> output format: image/png >> width height: 567,330 >> bbox: ReferencedEnvelope[-0.160528 : 0.46738, 51.331311 : 51.69676] >> >> but I have no idea on how to access this bbox information from a >> ContentFeatureSource in the getReaderInternal(Query) method. >> >> >> Dispatcher.REQUEST.get() and then, if not null (in test enviroment it >> can be), >> check the kvp map, it has the parsed BBOX among the others >> >> Can you share anything about that store? What does it do? >> Is it going to be released as open source? >> >> Cheers >> Andrea >> >> -- >> == >> Our support, Your Success! Visit http://opensdi.geo-solutions.it for >> more information. >> == >> >> Ing. Andrea Aime >> @geowolf >> Technical Lead >> >> GeoSolutions S.A.S. >> Via Poggio alle Viti 1187 >> 55054 Massarosa (LU) >> Italy >> phone: +39 0584 962313 >> fax: +39 0584 1660272 >> mob: +39 339 8844549 >> >> http://www.geo-solutions.it >> http://twitter.com/geosolutions_it >> >> ------------------------------------------------------- > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Windows: > > Build for Windows Store. > > http://p.sf.net/sfu/windows-dev2dev > _______________________________________________ > Geoserver-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geoserver-users > > ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Geoserver-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
