Speeding up load time for huge SHP files

[Dylan Beaudette]

On Friday 17 August 2007 15:29, Mevima Winn wrote:
> I'm currently building a mapping application off C#, MapServer 4.10, and
> approximately 45 SHP files.  Many of them are pretty fast to load,
> especially utilizing the MINSCALE/MAXSCALE function, but once I start
> zooming in to where US roads and tiny lakes start appearing, the app slows
> WAY down.  Our theory here is that it's either trying to load the whole
> shapefile and then zooming in on one spot, or reloading the shapefile every
> time there is a new request.
>
> So does anybody have an idea what might be happening?  The 350MB SHPfile
> tends to take 20 seconds or so to load, whereas the 2.5GB SHPfile can take
> several minutes.  Is there a way around this load time, or a way to
> optimize it?  We kind of need all of the data, at least at these particular
> zooms.

search the archives for a tool called 'shptree', and spatial index files

Dylan

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-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341