This documentation details the procedure one has to adopt for
putting together a Geowall.
1.1 What is a Geowall?
In plain terms, a Geowall is a low cost visualization system. It is
a desktop PC running either Windows, Linux or Mac OS X, with a fast
graphics card, two projectors and a screen. Each of the projectors display
a computer generated image for each eye. Filters placed before the bulb
of each projector polarize the image. When a viewer puts on polarized
glasses, he can see a true 3D image. This is called 'passive stereo'.
A significant advantage of passive stereo is that the images can be
viewed using cheap 3D glasses and avoids the costly shutter glasses
which active stereo requires.
1.2 What is it used for?
The Geowall, being a low cost system became instantly popular among
the research circles. It found usage in data visualization and also
in teaching science to college and graduate level students. EVL set
up the first Geowall at Chicago; since then at least 80 Geowalls have
been set up at universities, research laboratories and museums throughout
the United States. A good Geowall system can now be set up for as low
as 8500 USD.
1.3 Geowall and the Access Grid
The first prototype of the Geowall was christened 'AGAVE' Access
Grid Augmented Virtual Environment. The
idea was to support interactive observation and sharing of 3D data sets
between sites that already have Access Grid nodes established. The Access
Grid provided the video and audio channels required for collaborative
work; the AGAVE was a new visualization system to assist data analysis
by scientists. The AGAVE was renamed the 'Geowall' when geoscientists
understood the benefits of using a stereoscopic system in studying the
Earth's interior and natural phenomena.
The Geowall was incorporated into EVL's vision of Scientific Workspaces
of the Future called 'Continuum'
spaces and funding was received through the SWOF
Alliance expedition. Software like 'Immersaview'
was developed to support collaboration.
Besides this document you can also refer to the following :
1. The Geowall Consortium.
AGAVE site at the Electronic Visualization Laboratory.
If you have any questions please email the CAVERN group at email@example.com
Fig 1: This
is a typical Geowall set up. Roll the mouse over the individual
circled components to see an enlarged view.