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Best Regards,
Lucas Figueiredo
On 09/06/07, Rui Carvalho <[log in to unmask]> wrote:
> FYI
>
> ________________________________________
> Dr. Rui Carvalho
> http://www.casa.ucl.ac.uk/rui/
> Senior Research Fellow
> Centre for Advanced Spatial Analysis
> University College London
> 1-19 Torrington Place
> Gower Street
> London WC1E 6BT, U.K.
>
>
> -----Original Message-----
> From: Alan Penn [mailto:[log in to unmask]]
> Sent: 09 June 2007 14:57
> To: 'Rui Carvalho'
> Cc: 'Michael Batty'
> Subject: RE: What is an axial line?
>
> Rui, and why send off line messages addressed to you personally to the list?
> Again they just annoy people...
>
> All the best,
> Alan
>
> > -----Original Message-----
> > From: [log in to unmask] [mailto:[log in to unmask]] On
> > Behalf Of Rui Carvalho
> > Sent: 09 June 2007 14:20
> > To: [log in to unmask]
> > Subject: FW: What is an axial line?
> >
> > FYI
> >
> > ________________________________________
> > Dr. Rui Carvalho
> > http://www.casa.ucl.ac.uk/rui/
> > Senior Research Fellow
> > Centre for Advanced Spatial Analysis
> > University College London
> > 1-19 Torrington Place
> > Gower Street
> > London WC1E 6BT, U.K.
> >
> >
> > -----Original Message-----
> > From: Alan Penn [mailto:[log in to unmask]]
> > Sent: 09 June 2007 14:09
> > To: 'Rui Carvalho'
> > Cc: 'Bill Hillier'
> > Subject: RE: What is an axial line?
> >
> > Rui,
> >
> > why are you resending messages to the list that were sent there in the
> > first
> > place? This is very much against mail list etiquette as it annoys people
> > having their mail boxes filled up...
> >
> > Alan
> >
> > > -----Original Message-----
> > > From: [log in to unmask] [mailto:[log in to unmask]] On
> > > Behalf Of Rui Carvalho
> > > Sent: 09 June 2007 13:59
> > > To: [log in to unmask]
> > > Subject: Re: What is an axial line?
> > >
> > > FYI
> > >
> > > ________________________________________
> > > Rui Carvalho
> > > http://www.casa.ucl.ac.uk/rui/
> > > Senior Research Fellow
> > > Centre for Advanced Spatial Analysis
> > > University College London
> > > 1-19 Torrington Place
> > > Gower Street
> > > London WC1E 6BT, U.K.
> > >
> > >
> > >
> > > On Tue, 5 Jun 2007 13:59:24 +0100, Professor Bill Hillier
> > > <[log in to unmask]> wrote:
> > >
> > > >Rui, in syntax every axial line is drawn with respect to all others,
> > > >and you can only be sure that any line is a correct one by checking
> > > >it with reference to the system as a whole. The proper question is:
> > > >'Are axial graphs unique', that is, is there a correct one for every
> > > >urban system. I believe we showed two ways in which we could be sure
> > > >of this in my Rejoinder to Carlo Ratti. At that time - I think on
> > > >this mailbase - I challenged sceptics to show a case of a settlement
> > > >where, given that we agreed what was to be mapped, the definitions we
> > > >offered allowed more than one interpretation of the axial graph. So
> > > >far we have had no candidates.
> > > >
> > > >Anyway, until someone shows that axial graphs as we defined them are
> > > >not unique, and that there is not a 'correct' graph for each
> > > >settlement, we can say with reasonable confidence that an axial line
> > > >is any line that is a member of the set making up a correct axial
> > > >graph. In all other respects it is just a line drawn on a map.
> > > >
> > > >Since we cannot limit its length, connectivity or straightness, which
> > > >are the only intrinsic properties a line has, it is clear that we can
> > > >only define axial lines with respect to the system of which they form
> > > >a part, that is, with respect to the extrinsic, not intrinsic,
> > > >properties of each line.
> > > >
> > > >So if you are interested in the rigour or otherwise of axial mapping,
> > > >your question seems to be the wrong one. It really should be: Do
> > > >settlements have unique axial graphs ? To expect to build such a
> > > >graph from some kind of essentialist definition of a line, however
> > > >derived, is really a 'reifying slices' error.
> > > >
> > > >By the way, I don't like beer. But Portuguese wine is another matter
> > > >if you have access to a good producer ! - Bill
> > > >
> > > >
> > > >
> > > >
> > > >At 11:06 05/06/2007, you wrote:
> > > >>Free pints for life to the first who can give an unambiguous
> > definition
> > > >>of "axial line" -and that's out of a post-doc's salary, so you see how
> > > >>sure I am that this is mission impossible!
> > > >>
> > > >>C'mon Alan!
> > > >>
> > > >>Rui
> > > >>________________________________________
> > > >>Rui Carvalho
> > > >>http://www.casa.ucl.ac.uk/rui/
> > > >>Senior Research Fellow
> > > >>Centre for Advanced Spatial Analysis
> > > >>University College London
> > > >>1-19 Torrington Place
> > > >>Gower Street
> > > >>London WC1E 6BT, U.K.
> > > >
>
--
Lucas Figueiredo
http://www.flickr.com/photos/lucasfigueiredo/
Mindwalk
http://www.mindwalk.com.br
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