Milton, You can build a qix file using the shptree utility in the mapserver distribution.
P On Fri, Dec 4, 2009 at 10:00 AM, Milton Jonathan <[email protected]> wrote: > Hello there > > I was playing around with a bigger shapefile (200MB for the .shp, 815MB > for all files), made of lots of small features for streets and roads. > > First of all, rendering is quite good and fast, congratulations (and > poor ArcExplorer couldn't even open it!). But for other operations > that's not quite the case. > > I attempted to query the FeatureSource with a spatial filter, and wanted > to know if it intersected anything. For shapefiles 10 times smaller, it > works like a breeze. However, for the big one, it is still quite fast if > the query envelope is big (covers most of the features in the > shapefile), but absurdly slow if it covers only a handful of features. > > My guess is that this is related to the .qix quad-tree index. I read > Andrea's comments when fixing the memory issues in index generation ( > http://jira.codehaus.org/browse/GEOT-1498), and I think it may be the > reason (by the way, it's now quite fast and with a very low memory > footprint, congratulations again!). > So, maybe creating a deeper tree would solve this? Andrea, you mentioned > that the "command line tool is still available". Could you explain how > to get it? > > Thanks again > Milton > > -- > > Milton Jonathan > Grupo GIS e Meio Ambiente > Tecgraf/PUC-Rio > Tel: +55-21-3527-2502 > > ------------------------------------------------------------------------------ > Join us December 9, 2009 for the Red Hat Virtual Experience, > a free event focused on virtualization and cloud computing. > Attend in-depth sessions from your desk. Your couch. Anywhere. > http://p.sf.net/sfu/redhat-sfdev2dev > _______________________________________________ > Geotools-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-devel > ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ Geotools-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
