[OSGeo-Discuss] Thoughts on how to use elevation in routing
woodbri at swoodbridge.com
Wed Sep 15 07:24:53 PDT 2010
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 for the US. The BIG problem is how to do this from a great many
points as it is compute cost heavy.
There are also problems with vegetation blocking the view, but just
computing the potential view based on the DEM might be a good starting
point. By comparing the difference between a DEM that looks at the
ground and one that looks at the vegetation you can probably get a good
idea of whether or not the view is hidden by the vegetation.
So many ideas and so little time and compute power <sigh>.
In the idea of costing cross traffic turns higher than with traffic
turns, this would be a very cool feature to have in pgRouting. In the
abstract we are adding a cost at a node based on a rule. If the rules
are extensible, then a node might also represent a bus stop and a
schedule such that given an arrival time at the stop we can cost then
compute the wait time for each successive departure when doing
On 9/15/2010 10:09 AM, Anton Patrushev wrote:
> 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.
> On Wed, Sep 15, 2010 at 7:22 AM, Geoff Hay<geoffrey.hay at otago.ac.nz> wrote:
>> Hi All
>> I seem to remember reading somewhere that UPS delivery routes are
>> constructed with only right turns (or left depending on the country) so as
>> to make use of 'free' turns to avoid waiting at traffic lights.
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> Discuss at lists.osgeo.org
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