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SPACESYNTAX  2004

SPACESYNTAX 2004

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Subject:

Re: Spatio-temporal map of U.K.

From:

Alan Penn <[log in to unmask]>

Reply-To:

[log in to unmask]

Date:

Wed, 1 Dec 2004 12:21:35 -0000

Content-Type:

multipart/mixed

Parts/Attachments:

Parts/Attachments

text/plain (67 lines) , 62Penn-habitablespace.pdf (67 lines)

Anzir, 

I hadn't realised that you were interested in the small scale network
implied by the pedestrian mode - I thought it was more a regional thing. You
might like to take a look at that attached paper I gave at the last Space
Syntax Symposium in which I developed spatio-temporal maps for urban areas
and building interiors. In this paper I develop both single point of origin
and all to all representations involving both spatial configuration and time
of travel, and show that for a given 'maximum speed' that these are
representable on a surface in three dimensions (and so as a contour map if
you want). It is however a simple matter to demonstrate that if you allow
variable travels speeds that these fill a volume in space time from a single
point of origin, and that if you go further to look at all to all
interactions these require certain constraints to be representable in a
three dimensional volume - for example that travel times are the same in
each direction on a trip. 

Alan Penn
Professor of Architectural and Urban Computing
The Bartlett School of Graduate Studies
University College London
Gower Street
London WC1E 6BT
+44 (0)20 7679 5919
[log in to unmask]
www.vr.ucl.ac.uk
www.spacesyntax.org
 

> 
> Noah,
> On Tuesday, Nov 30, 2004, at 09:55 Europe/London, Noah Raford wrote:
> 
> > Dear Anzir,
> >
> > Do you mean an all-point to all-point travel time map?  Something
> > displaying the average travel time to all points?  This sounds similar
> > to metric integration, which would of course be focussed on the centre
> > of the UK.  I think you probably mean something more sophisticated
> > though, reflecting the configurational conditions of the road network.
> > Someone probably has done something similar but I haven't come across
> > it
> > myself.  Good luck!
> 
> Unfortunately not... this was simply a map of the UK distorted to show
> best travel times from London. Something that was more complex or
> sophisicated than this would be very difficult for a network where the
> travel time on links can vary according to their type or other
> characteristics. For example, on rail, Leeds is 2 hours from London by
> fastest train, and also 2 hours from Birmingham (which is about half
> the distance).
> 
> Such a flat map cannot display such things. A GIS based contour map,
> however, would be more suited to displaying that information (I guess
> you would have fields with travel time from London, Birmingham,
> Manchester, Glasgow, etc. in the dataset and simply draw contour maps
> from each. I know this is possibly a little simplistic, but going
> beyond this would require the GIS to literally follow the network in
> the way the OS' routing plug ins can do (I've used OSCAR before, but
> this doesn't give travel times. We were also trying to use it for
> calculating walking distances when it's a road based tool, which meant
> we couldn't exploit footpaths and alleyways).
> --
> Anzir Boodoo MRes MILT Aff. IRO
> transcience, Leeds Innovation Centre, 103 Clarendon Road, LEEDS LS2 9DF

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