[6707] in www-talk@info.cern.ch
Re: Inline support for vector files
daemon@ATHENA.MIT.EDU (David Crossley)
Thu Nov 17 21:00:22 1994
Date: Fri, 18 Nov 1994 02:25:41 +0100
Errors-To: listmaster@www0.cern.ch
Reply-To: davidc@erin.gov.au
From: davidc@erin.gov.au (David Crossley)
To: Multiple recipients of list <www-talk@www0.cern.ch>
Stephen Trew <s.trew@qub.ac.uk> said to www-talk:
> I ead Jodi Moline's paper from the 2nd WWW conference,
>
> Inline Support for Vector Files: Engineering Dawings on the WWW
> http://www.ncsa.uiuc.edu/SDG/IT94/Proceedings/DDay/moline/moline.html
>
> How was this paper received at the conference? This is an issue I would
> like to see addressed. In the School of Geosciences at QUB we want to
> provide maps and GIS information over the Web and support for an inline
> vectro format is critical.
The paper was delivered by other people from Softsource - the CAD company
proposing Simple Vector Format (SVF) and its incorporation into WWW. The
paper was generally very well received.
The proposal shows support for in-line vector files which can be zoomed
and panned, layers switched on and off to prevent clutter and mis-use as
you zoom in, regions of layers defined as hotlinks, local actions defined
- all at the client-side.
This is very important for many areas though I too feel that it is critical
for Geographic Information Systems. We have been building all sorts of
workarounds to imagemap and raster files.
> Jodi mentioned that DXF, the de facto standard, is being looked at but
> hinted that it does not meet the needs for an inline vector format, and
> SoftSource intent to create a new vector format meet the needs.
>
> If you read this list Jodi (you did not give your email address) why
> does the standard format, DXF, not meet the needs. Does the fact that
> many current CAD, GIS and image pckages support DXF not mean we should
> push it as the standard format?
As I understand it, DXF is simply a drawing exchange file and does not
have enough structure to do the job. I think that it lacks the topology
to have objects such as polygons and, most importantly, it has no way to
define a region as a hotlink to some URL.
The uproar from the audience was more along the lines of "Why not use
Computer Graphics Metafile (CGM) rather than create yet another format".
> ----------------------------------
> Stephen Trew <><
> School of Geosciences
> Queen's University of Belfast
> Belfast
> BT7 1NN
There is a newly created discussion list for SVF and there is also
discussion on GeoWeb (serving geographical information through WWW).
Try these URLs:
http://www.niiip.org/svf/
http://wings.buffalo.edu/geoweb
http://www.softsource.com/softsource/vector.html
I would like to see relevant discussion continue on www-talk to solve
some of the technical issues specific to WWW.
___________________________________________________________________________
David Crossley - Geographic Information Systems Manager GPO Box 787
email: davidc@erin.gov.au Canberra ACT 2601
phone: +61 6 274 1139 fax: +61 6 274 1333 Australia
URL:http://kaos.erin.gov.au/
ERIN Environmental Resources Information Network ERIN
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