On 07/12/2010 12:53 PM, Gabriel Roldan wrote: > On 7/12/10 4:52 AM, Andrea Aime wrote: > >> Gabriel Roldan ha scritto: >> >>> On 7/9/10 5:25 PM, Andreas Hocevar wrote: >>> >>>> Hi, >>>> >>>> just a quick note to let you know that proj4js can do lazy loading of >>>> crs definitions. >>>> >>>> But I doubt that we will be using projections other than 900913 in >>>> the map viewers, because 900913 is our only option if we want to use >>>> Google layers (and OSM if we don't want to provide our own tileset). >>>> >>> But there may be the case that the user doesn't care about google layers >>> nor OSM ones, he just want to use data from his municipality's WMS, but >>> the WMS doesn't support 900913. If GeoNode doesn't support the CRS the >>> data is published in, then he can't use the data at all. Then GeoNode is >>> useless. >>> >> A bit of self promotion: GeoServer 2.1 can do WMS cascading and handles >> reprojection transparently, doing the necessary negotiation and >> reprojecting on the fly if necessary. >> It works for GetFeatureInfo as well >> >> Now, I understand that from where you are today, to having to configure >> GS as a cascading WMS for all remote layers and moving GeoNode to GS >> 2.1 is quite, is a long stretch. >> >> > As a matter of fact that's the first thing I thought when faced the > problem of not being able to add my municipality layers. But besides > being tied to 2.0.x, I'm not sure if we'd want to direct all traffic to > our geoserver instance. But it's still an option. > > >> Just sharing an option ;-) >> > thanks :) > >> Cheers >> Andrea >>
How does GeoServer's cascading WMS work? Would we expect degradation due to warping of the tiles instead of re-rendering in the target projection? If there are visual artifacts then I expect we would want to use this only as a fall-back option regardless of performance concerns. We are already discussing having GeoNode cache all remote WMS layers in GeoWebCache, so I don't think that it would especially burdensome (development-wise) to have it cascade them all in GeoServer as well. At least, let's not strike it from the realm of possibility too hastily. -- David Winslow OpenGeo - http://opengeo.org/
