[Freegis-list] time based maps

[Anselm Hook]

No doubt it would look weird but thats just topology.  Maybe a more
comprehensible way would be to show human subjective distance as another
dimension such as say elevation - human slow paths would be suggested by a
steep hill to ascend and descend.

Actually it could be pretty useful even for casual users; a visitor to the
bay area might see that the 280 is *way* shorter than the 101 around rush
hour.

Or squiggly lines could represent slowness; a freeway would look straight
and the slow parallel street would be serpentine.

On Mon, 23 Sep 2002, Martin, Daniel wrote:

> It sounds nice, but I don't understand how a connected network of streets
> can be expressed in units of time.  Often you have a highway with an average
> traveling speed of 65 mph and right beside it you have a parallel side
> street with an average traveling speed of 20 mph.  The two streets then have
> perpendicular cross streets connecting them.
>
> Perhaps you see it differently than I do.
>
> -Dan
>
>
>
> -----Original Message-----
> From: Anselm Hook [mailto:anselm at hook.org]
> Sent: Monday, September 23, 2002 2:09 PM
> To: Matt.Wilkie
> Cc: freegis-list at intevation.de
> Subject: Re: [Freegis-list] time based maps
>
>
>
> A friend one mentioned a similar idea - It was appealing - that the actual
> landscape or mental map we have isn't exactly literal.  Some paths are
> longer because of red lights or certain neighhbours we want to avoid.
>
> As you said - you could take an ordinary map and apply a rendering
> deformation based on the 'real' length of the navigation routes in it.
> Sounds great!
>
>  - a
>
> On Mon, 23 Sep 2002, Matt.Wilkie wrote:
>
> > The open source community is often accused of merely "chasing tail lights"
> > instead of actively engaging in developing truly innovative features. Well
> I
> > believe I've identified an area which addresses a real need but for which
> > there are no tools available (that I'm aware of) - proprietary or not.
> >
> > Time based maps: the base units of measurement are *time* instead of
> space.
> > The length of a highway line on a map represents how long it takes to
> drive
> > from Berlin to Paris, not how many kilometers apart they are.
> >
> > Most of the time when people ask how far away the next town is, they don't
> > really want to know how far it is, but rather how long it will take them
> to
> > get there.
> >
> > I envision a set of georeferenced vectors with database attributes that
> > indicated the quality of the road and the posted speed limit. When the
> > cartographer creates the map she decides on a scale of 1cm:10min and
> selects
> > the vector(s) which the map will be centered on. The software tool then
> > expands/contracts the length of the vector(s) to match and surrounding
> > topography is rubber-sheeted or morphed accordingly.
> >
> > Naturally not everybody travels the same way. Some have ferraris, others
> > freightliners, still others prefer bicycles and some just like to walk.
> This
> > just begs for an internet mapping application where the user can chose
> their
> > method of conveyance.
> >
> > Also consider the application in large cities where the traffic density
> > could be taken into account and near real time maps depicting how long it
> > will *really* take to get to work this morning are shown.
> >
> > BTW, I can't take any credit for this idea, it's not mine. I've been
> > thinking about for some years, ever since I saw some Inuit drawn maps from
> > the 18th/19th century showing the northern coastlines of Canada. In my
> > youthful arrogance I commented on how primitive the maps were, lacking all
> > concept of projection or relative size. My teacher then demonstrated how
> the
> > maps were actually incredibly accurate -- if one were paddling in a kayak
> > and keeping track of how long it took to get to the next base camp. Score
> > another one for "primitive" societies.
> >
> > cheers,
> >
> >
> > -- Matt Wilkie
> > --------------------------------------------
> > Geographic Information,
> > Information Management and Technology,
> > Yukon Department of Environment
> > --------------------------------------------
> >
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> >
>
>
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