Speeding up the visualization of a shapefile with more than one million of lines {Scanned} {Scanned}

[Luca Manganelli]

On 11/20/07, Siki Zoltan <siki at agt.bme.hu> wrote:
> The fasters solution is if you pregenerate the overview layer instead of
> on the fly generation with for example FILTER.

what's the overview layer?