Andrea Aime wrote: > Justin Deoliveira ha scritto: >> Unfortunately I have run into this issue in a few places, and the only >> time the answer is to do a full lookup. I always to try to set >> fullScan to false, but it seems to only work some of the time. I >> understand the cost of the lookup but I see no other alternative in a >> case where you *need* an SRS code. >> >> Can we perhaps on startup of geoserver force a full lookup and cache >> it so that we can be 100% sure that lookupEpsgCode with fullScan set >> to false will return an answer? > > Nope, that would not help. The fast version works only if your > random WKT contains the AUTHORITY specification with the code > the wkt is supposed to be, in that case the fast path reads > the official code and compares the two, returning the official > one if equal Then I am not sure I can avoid an expensive lookup. If someone gives me a shapefile with no authority in its .prj what can I do? > >> I could amend the code to use the WKT, but that would be a bit of a >> pain. It will also be problematic with rest, because an EPSG code is >> needed in order to get at data. Making the client parse WKT will be >> problematic. > > I've lost you there. The SRS is a string and is stored so should > be always available anyways, what's taking long is trying to represent > the native CRS as an epsg code (at least, that is my guess... I'll > check better). No OGC request uses the native CRS no? I was referring to saving out the WKT of the CRS, rather that first looking up the epsg code and then saving that out.
I am also curious as to under what circumstances a look up can be as expensive as you refer to. A quick test of a lookup with full scan of some random WKT I time at ~800ms on my machine. The non full scan takes ~650ms. While I realize this adds up in a loop that has to iterate many times. Is that where you are running up against it? Regardless, I am not against adding a flag to disable the lookup if that will solve the problem, as long as we have the option to enable it. > > Cheers > Andrea > -- Justin Deoliveira OpenGeo - http://opengeo.org Enterprise support for open source geospatial. ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Geoserver-devel mailing list Geoserver-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-devel
