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>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.<br>
<br>
Jason Birch schreef:
<blockquote
cite="mid:8E468917B01800408B91984428BE03DD072A5B5F@starfish.nanaimo.ca"
type="cite">
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<div dir="ltr" align="left"><span class="196544320-08112007"><font
color="#0000ff" face="Arial" size="2">Have you seen the dynamic
routing that Christopher Schmidt has done with OpenLayers?</font></span></div>
<div dir="ltr" align="left"><span class="196544320-08112007"></span> </div>
<div dir="ltr" align="left"><span class="196544320-08112007"><font
color="#0000ff" face="Arial" size="2"><a moz-do-not-send="true"
href="http://crschmidt.net/blog/archives/268/openlayers-routing-with-a-little-help-from-my-friends/">http://crschmidt.net/blog/archives/268/openlayers-routing-with-a-little-help-from-my-friends/</a></font></span></div>
<div dir="ltr" align="left"><span class="196544320-08112007"></span> </div>
<div dir="ltr" align="left"><span class="196544320-08112007"><font
color="#0000ff" face="Arial" size="2">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.</font></span></div>
<div dir="ltr" align="left"><span class="196544320-08112007"></span> </div>
<div dir="ltr" align="left"><span class="196544320-08112007"><font
color="#0000ff" face="Arial" size="2">Jason<br>
<br>
</font></span>
<hr tabindex="-1"><font face="Tahoma" size="2"><b>From:</b> Matthew
Pulis<br>
<b>Subject:</b> [postgis-users] Open Source GIS System<br>
</font></div>
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.
<pre wrap="">
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<p class="style4">Milo van der Linden
<br>
<a href="skype:milovanderlinden?add">skype: milovanderlinden</a><br>
<a href="mailto:mlinden@zeelandnet.nl">mlinden@zeelandnet.nl</a><br>
<a href="mailto:milovanderlinden@gmail.com">milovanderlinden@gmail.com</a><br>
<a href="mailto:milo@3dsite.nl">milo@3dsite.nl</a><br>
<a href="http://www.3dsite.nl">http://www.3dsite.nl</a><br>
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