Re: [Geotools-gt2-users] How to speed up rendering for large shapefiles

[Jody G. <jod...@gm...>]

There was recently some work on that - the idea is to process your
data into a series of differnt data sets (at different
simplifications). And then change between them as the scale of the map
is changed. This allows you to generate the correct visual all the
time; using just enough information and no more.
- http://docs.codehaus.org/display/GEOTDOC/Feature-Pregeneralized

I usually hack away at my data in PostGIS; to generate the
simplifications. I have found the performance between postgis and
shapefile to be similar; you can always reexport the simplified data
in order to try out a couple different combinations.

Jody

On Fri, Jun 12, 2009 at 12:22 AM, WGPuckett<WGP...@ao...> wrote:
>
>
>
> aaime wrote:
>>
>>
>> Use the ShapefileRenderer, it's a custom implementation geared towards
>> rendering shapefiles faster
>>
>> Cheers
>> Andrea
>>
>>
>
> Thanks, I will give that a try.
>
> If necessary doing conversions is not a problem.  We have a fixed mapping
> structure that will be used.  If we need to take the data through a
> conversion and save it in a "pre processed" format to make it more efficient
> we can do that.  Is there a format that is better than directly reading
> shape files each time?  Can the data be pre-processed for a more effecient
> application?
> --
> View this message in context: http://n2.nabble.com/How-to-speed-up-rendering-for-large-shapefiles-tp3060228p3062256.html
> Sent from the geotools-gt2-users mailing list archive at Nabble.com.
>
>
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