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 Loskot http://mateusz.loskot.net _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
