map performance

[Ben Madin]

G'day Boice, Steve et al.,

We are having a similar problem, but we need to be able to generate  
international maps by state level for a number of categories and  
different time periods... We are using a large (90MB) shapefile, but  
I was wondering about trying to reduce it for the 600 x 300 window we  
display it in! We do have a country boundaries only layer, but for  
some countries (ie Australia, Canada) the state level polygons are  
bigger than many countries (ie in Europe), so it would be nice to be  
able to have the option to show states uniformly across the planet.

Because it has been taking so long to generate the maps, we are only  
displaying them in lat long now, but we would like to be able to go  
back to the ortho projection we were using before, as it looked much  
smarter.

Can you recommend any tools to reduce the resolution / size of a  
shapefile?

cheers

Ben


> From: boice tomlin <boice at RUNSKIP.COM>
> Date: 9 December 2006 5:45:21 AM
> Subject: Re: map performance
>
>
>
> Steve,
>
> Reduced resolution datasets are the trick....  I just increased  
> performance 10 fold by substituting a reduced polygon shapefile.
>
> thanks for your help on both fronts.
>
> -boice
>
>

-- 

Ben Madin
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