Mateusz Loskot schrieb: > Tom Kazimiers wrote: > >> Hi there, >> >> the documentation gave me no real answer to the question if there is >> something like a caching mechanism for feature request. If I request a >> feature, is this read from disk every time or somehow cached? >> > > Tom, > > AFAIK, there is no caching mechanism. > I've it on my TODO list to develop a thin wrapper on Shapelib or OGR that > will provide caching support, to minimize disk I/O operations. > > >> Another thing I could not find out is how I can activate spatial >> indexing for shape files - the documentation says I should execute the >> following SQL command: CREATE SPATIAL INDEX ON tablename [DEPTH N] >> But what is tablename and how do I know if the spatial index is created? >> > > Spatial index is automatically activated if OGR Shapefile driver finds > .qix file for your Shapefile. > > Let's say you have Shapefile called roads.shp|.shx|.dbf > Tablename is "roards" - a filename without extension. > > Here you can find some real example: > > http://mateusz.loskot.net/?p=227 > > Best regards, > Mateusz,
thank you very much :) Regards, Tom _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
