[OpenLayers-Dev] tilecache for vector data

[mpriour]

This IS definately an idea that has merit. A number of other people have
discussed this issue. Tiled vector datasets work well for points, pretty
good for lines, but run into some serious issues with polygons.
There is already a python based tool developed by Microsoft Research Labs
that breaks up point & line datasets into small javascript files containing
object literals (I don't know if GeoJSON is used or some other format). You
can find this at:
http://research.microsoft.com/MapCruncher/TiledVectors/TiledVectorsDemo-1.1/description.html
http://research.microsoft.com/MapCruncher/TiledVectors/TiledVectorsDemo-1.1/description.html 

You can also read some ideas on this on the MapWrecker blog (the most
interesting part is in the comments section):
http://mapwrecker.wordpress.com/2007/07/17/well-know-vs-rational-vector-delivery/
post 1 ,
http://mapwrecker.wordpress.com/2007/08/24/rational-vector-delivery-pre-game/
post 2 
 hope that helps validate your idea and give you some perspective on what
other's have thought about this problem.
Matt Priour
Kestrel Computer Consulting


Guillaume Sueur-2 wrote:
> 
> Hi,
> 
> Has anyone of you had a thought about caching vector data in a web 
> format (GML, GeoJSON, GeoRSS...) ?
> What I mean is a tilecache system for which one would set a tolerance 
> depending on the scale, and which would store the little files 
> corresponding to the generalized original data on the tile extent.
> 
> Do you think the performances of vector display would be increased or is 
> this idea complete crap ?
> 
> Thanks
> -- 
> Guillaume SUEUR
> 
> 
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> 
> 

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