[Mapserver-users] SHP file simplification

[Joe Bussell]

We approached this problem by splitting out different road 
classifications.  Each was then given its own MINSCALE and MAXSCALE 
declarations.  I believe that this choice has produced a resonable 
presentation of roads at different scales.

Cordially,

Joe Bussell
www.trafficdodger.com
On Time Systems

Frédérique Boyer wrote:
> Hi all,
> 
> I'm using mapserver on a linux debian.
> I have all the maps of France (buy from IGN) and these maps are very precise
> and acurate.
> All works fine when I display a map with a distance of 1 to 50 kilometers.
> 
> My problem is when I have to display 100 or more kilometers.
> The vectors of roads are very numerous (>= 200.000) and the server takes
> more than 3 minutes to make my map.
> 
> I think, the reason is that the server reads all the vectors to transform
> them in a polyline before display.
> It coul'd be accelarated with a very little number of vectors.
> At this level, I don't use such a precision.
> 
> So, i have two solutions :
> Buy some maps with less precision  not very cheap :-(  )
> Find a tool able to simplify a shape file.
> 
> Someone knows if such a tool exist and where i can find it ??
> 
> Note : I don't have arcview.
> 
> Thank's a lot
> Frédérique
>