On 27/02/09 14:19, Markus Metz wrote:
Moritz Lennert wrote:
Yes, querying the geometries is very slow currently because of the
fact that the spatial and topological index is kept in memory and not
on file, so every time you launch an interactive query, it has to
rebuild it which is very slow on large vectors. See
http://josef.fsv.cvut.cz/WIKI/grass-osgeo/index.php/GRASS_7_ideas_collection#Radim.27s_TODO_list
Does someone remember the reason why the spatial index is not (no
longer?) written to a file? Once the spatial index is (again?) written
to a file, all that rebuilding could be avoided by reading from the
file, that alone could give a speed increase.
http://www.intevation.de/rt/webrt?serial_num=3193
See also hints from Radim on how to implement file-based index:
http://lists.osgeo.org/pipermail/grass-dev/2006-September/025780.html
Moritz
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