[postgis-users] Open Source GIS System

[Milo van der Linden]

 From my experience with a firebrigades application in the Netherlands 
where we calculate drive time spiders, I know that every time you 
generate a road block or open a road, the entire network has to be 
pre-processed. In the case we went through, this ment recalculating a 
network of 200000 streetsegments per customer and re-calculation took an 
average of 20 seconds. So it is technically possible, just make sure you 
make it a well structured background process.

Jason Birch schreef:
> Have you seen the dynamic routing that Christopher Schmidt has done 
> with OpenLayers?
>  
> http://crschmidt.net/blog/archives/268/openlayers-routing-with-a-little-help-from-my-friends/
>  
> It's pretty cool.  Much of the routing work could be done for you by 
> using this code (assuming that Chris is sharing).  I think that in 
> either case the network has to be pre-calculated though, so on-the-fly 
> addition of road blocks and the like may not be technically possible.
>  
> Jason
>
> ------------------------------------------------------------------------
> *From:* Matthew Pulis
> *Subject:* [postgis-users] Open Source GIS System
> I am preparing to build up a GIS system as part of my University 
> Masters Thesis. My final aim is to build a system where the user 
> inputs (or via GPS) 
> inputs the location where he is and the location where he want to go and gets the route planned. My main concern will be that the driver can decide which route to take, if the shortest 
> distance, least time consuming or else least fuel consumption. Also 
> the route planned has to be aware of certain problems that the network 
> can find, for example road blocks, or some other type of incidents / 
> accidents.
> ------------------------------------------------------------------------
>
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>   


-- 


	

Milo van der Linden
skype: milovanderlinden <skype:milovanderlinden?add>
mlinden at zeelandnet.nl <mailto:mlinden at zeelandnet.nl>
milovanderlinden at gmail.com <mailto:milovanderlinden at gmail.com>
milo at 3dsite.nl <mailto:milo at 3dsite.nl>
http://www.3dsite.nl

	  	

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