Yes, on the OSGeo Discuss list there was the interesting suggestion that
one could compute the viewshed for points along a road segment to get an
estimate of the potential view from that segment. I'm thinking about
doing this in the future since I already have the DEM which would be
required fo
Sounds to me like the kind of application that gets sold to someone in the UK,
who are then surprised that all their deliveries start to take longer... (no
free turns at red lights in the UK, red means stop)
- Original Message -
> Correct, but not with only right (left) turns, but with m
Correct, but not with only right (left) turns, but with much higher
costs for left (right) turns.
Slightly off the topic - at the FOSS4G conference poster session I saw
very interesting application for tourism with costs assigned according
to how beautiful or interesting road segments are.
Anton.
.osgeo.org [discuss-boun...@lists.osgeo.org] On
Behalf Of Bob Basques [bob.basq...@ci.stpaul.mn.us]
Sent: Wednesday, 15 September 2010 6:26 a.m.
To: discuss@lists.osgeo.org
Cc: Stephen Carver; Justin Washtell
Subject: RE: [OSGeo-Discuss] Thoughts on how to use elevation in routing
All,
The view of ro
Sent: 14 September 2010 17:31
To: discuss@lists.osgeo.org
Subject: Re: [OSGeo-Discuss] Thoughts on how to use elevation in routing
On 9/14/2010 11:43 AM, Bill Thoen wrote:
> Steve,
>
> Adding viewsheds to the package would certainly up the computing costs;
> I was wondering if
Carver; Justin Washtell
Subject: RE: [OSGeo-Discuss] Thoughts on how to use elevation in routing
Hi OSGeo Discussions, (cc Steve, Justin),
In terms of the computing of viewsheds, both Steve Carver
(http://www.geog.leeds.ac.uk/people/s.carver/) and Justin Washtell
(http://www.comp.leeds.ac.uk
ephen Woodbridge
Sent: 14 September 2010 17:31
To: discuss@lists.osgeo.org
Subject: Re: [OSGeo-Discuss] Thoughts on how to use elevation in routing
On 9/14/2010 11:43 AM, Bill Thoen wrote:
> Steve,
>
> Adding viewsheds to the package would certainly up the computing costs;
> I was won
All,
One thought just occurred to me related to this thread, what would street
construction type add to the equation? Dirt/gravel/blacktop/concrete, add on
to that age of road/ADT and roughness might start becoming a factor as well. I
know these are getting a bit right or left of the origina
Yes, this is another good factor to look at. Curvature can be computed
as the 2nd derivative or the rate of change in angle along the road.
This is a little harder to compute with segments as you need to join
adjacent segments to compute this or you get disconnects where they
join. And you have
I think "cruvyness" might also be a useful resistance factor, and it
is often associated with grade, as in steep mountain roads with lots
of switchbacks. After attending FOSS4G last week my wife and I have
been driving and biking in the Pyrenees and experiencing the effects
of both cruvyness and gr
On 9/14/2010 11:43 AM, Bill Thoen wrote:
Steve,
Adding viewsheds to the package would certainly up the computing costs;
I was wondering if you had a limit to what sort of processing power
you've got there. ;-)
It is not unlimited, so part of the problem that is interesting to me is
how to f
Steve,
Adding viewsheds to the package would certainly up the computing costs;
I was wondering if you had a limit to what sort of processing power
you've got there. ;-)
I also think what you're proposing might be interesting, but you have to
be careful about what conclusions you can draw fr
Bill,
Thanks for the ideas. I might try to do something with the viewshed idea
in the future. It would need a LOT of computing to process all the road
segments in a National dataset like Tiger.
But for now I would like to figure out the routing costs.
One idea I had was to compute the grade
Stephen Woodbridge wrote:
Hi all,
(This is cross posting from the pgrouting list, sorry for the dups.)
I have preprocessed some shapefile data and added elevation
information in the Z value of the coordinates. I'm wondering how to
best utilize that in routes and would like any thoughts or ide
Stephen,
You didn't explicitly mention it, but TIME might be an additional item to
include, as in different vehicles will take different amounts of time to
traverse. Once you ave a good set of constants for the different types of
vehicles, you could add in "Time to Traverse" as a graph indica
Hi all,
(This is cross posting from the pgrouting list, sorry for the dups.)
I have preprocessed some shapefile data and added elevation information
in the Z value of the coordinates. I'm wondering how to best utilize
that in routes and would like any thoughts or ideas you might be willing
to
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