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| Subject: | GISList: Visualisation - summary |
| Date: |
01/07/2003 11:20:52 AM |
| From: |
John Lee |
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Dear all,
I recently asked a question about visualisation of Ordnance Survey data.
First of all a big thank you to all those who replied: Robert Lega, Robert
Heitzman, Kevin Ball, Telmo Pina Nunes, David Nealey, Andrew Hoppin, Volker
Mell, Ivan Lucena and Graeme Brooke: respect to all of you.
I started off using Arcscene, because that’s what I had on my desk. At the
time of posting the email I had only just started to use the software, so I
certainly hadn’t explored its full capabilities. It seems easy to use but
there are doubts about its export module, its speed for fly-through
generation and its rendering.
Someone said that a graphics card is never able to handle complex
geographical data and what is needed is data conversion into a
visualisation-specific format such as OpenFlight (.FLT) or Tiled Scene Graph
which rearrange the priorities to allow visualisation rather than analytical
aspects to come to the fore. Alternatively, I could reduce the resolution
of the data, especially if I don’t have a whiz-bang, super fast computer.
Lots of people suggested other visualisation products, some free, some not:
here is a list of these and their web sites:
Microdem free at:
http://www.usna.edu/Users/oceano/pguth/website/microdem.htm
John Childs page at http://www.terrainmap.com/
CommunityVIZ at http://www.communityviz.com/
3DEM low cost at: http://www.visualizationsoftware.com/3dem.html
Vue d'esprit or Terragen
Other software houses at http://www.3dlinks.com/software_landscape.cfm
World Construction Set at http://www.3dnature.com
Original request:
I would like some advice please.
I want to visualise some 3D terrain models. This is likely to include some
rotation, zooming in, development of fly-throughs and later, addition of
textures to make the scenes more 'life-like'. I have built the DEM from UK
Ordnance Survey (the UK's national mapping organisation) data and I have
draped raster files over the top (several big TIF files).
Currently I am using ArcScene to enable my visualisation, but there seem to
be limits to the program. Part of the problem is that my graphics card is
unable to cope with the data volumes, but the process of developing
fly-throughs seems to be quite long-winded (export of individual scenes to
another software package etc.) and adding textures is, as far as know,
impossible.
I am limited to using ArcGIS for our GIS processing, but we have some money
available to buy visualisation software. Does anybody have any thoughts,
experiences, comments on visulisation software of GIS data.
Seasons greetings to everyone.
John Lee
*****************************************
Dr. John Lee
Postdoctoral Researcher in Bioinformatics
GIS & Habitats Research Group
School of Biological and Molecular Sciences
Oxford Brookes University
Headington Campus
Gipsy Lane
Oxford
OX3 0BP
United Kingdom
Tel. (+44)(0)1865 483269
Fax. (+44)(0)1865 483242
Email. jlee@brookes.ac.uk
*****************************************
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