Space Syntax researchers who have read CASA's Working Paper No. 69 may also be interested in having a look at my award-winning poster presented at GIScience(2002) and the manual of the ArcView extension Isovist Analyst.
They are available in PDF format from the following addresses:
1. Poster (~1.6Mb): http://www.casa.ucl.ac.uk/sanjay/rana-giscience2002-poster.zip
2.Software Manual (~500kb): http://www.casa.ucl.ac.uk/sanjay/rana-iaextension-readme.zip
These are the articles (written in 2002), where I first proposed and demonstrated the plot of maximum diametric length measure as a surface/field and how the lineaments of this measure's surface reveal the structure (see results sections in poster and page 7 of manual) of the open space. The poster also shows the rank-and-overlap-elimation (ROPE) methodology which extracts the lines of dominant visibility (similar to axial lines) also using the maximum diameters. Paper 69 shows a method for an automated extraction of lineaments.
Please also look out for my proposed short-paper in the international journal of architectural computing (around new year) on how various isovist measures can be used for the "visualisation" of structure of open spaces and practical applications such as surveillance and aesthetics. It also shows a morphometry-based automated method for the extraction of lineaments of max. diametric length surface.
Also, do make sure to have a copy of the recently-published theme issue of Environment and Planning-B on "visibility analysis" of which I was the guest editor. I believe this is the first-ever inter-disciplinary compilation of articles on visibility analysis and could be a key reference for beginners and a good read for advanced researchers. Please visit the URL http://www.envplan.com/epb/epb_current.html#iss5 for more information.
Finally, I have two requests:
1. I am looking for 3D architectural/structural plans e.g. of a public open/interior spaces to experiment as inputs to my software (under development) for 3D isovist analsis. I would prefer real data however complex they may be, but for smaller dimensions to start with.
2. I know from isovist analyst extension registration log that there have been more than 600 downloads of the Isovist Analyst Extension, which is a lot of downloads for a relatively specialised research area like space syntax. I think it would be interesting if some of the mailbase users who used the software could let us know how they used it and any useful applications. This will add to my current motivation in developing a much larger mapping application packed with a much broader range of space syntax analyses/applications and all computations related with it. Please feel free to send me a personal email at [log in to unmask] (note my new affliations) if you like to develop a collaboration for academic or commerical purposes.
I will be very happy to summarise any responses.
cheers,
Sanjay Rana.
Lecturer in Geographical Information Science
Department of Geography
University of Leicester
Leicester LE1 7RS
UK
>Date: Thu, 4 Dec 2003 15:31:59 -0000
>Reply-To: "[log in to unmask]" <[log in to unmask]>
>Sender: "[log in to unmask]" <[log in to unmask]>
>From: Rui Carvalho <[log in to unmask]>
>Subject: Re: Scaling and universality in the micro-structure of urban space
>Content-Type: text/plain; charset="iso-8859-1"
>Members of the mailbase interested in automatic extraction of axial lines
>may also want to have a look at the following preprint:
>A rigorous definition of axial lines: ridges on isovist fields
>Authors: Rui Carvalho, Michael Batty
>The paper can be downloaded from the CASA working paper series at:
>http://www.casa.ucl.ac.uk/working_papers/paper69.pdf
>or from arXiv.org:
>http://arxiv.org/abs/cs.CV/0311012
>-Rui
|