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Chapter 15 What’s Next for Geospatial Technology?
Wearing the 3D glasses, the viewer perceives the images in a 3D effect as
if the items and images are appearing off the screen—similar to watching a
stereoscopic 3D movie. Viewing and interacting with imagery like this gives
a sense of depth or immersion, as some items will be in the foreground of the
image and some will be in the background. Figure 15.10 shows an image of
a GeoWall in use from the perspective of an outsider not wearing the polarized glasses (without the glasses, the images would appear blurry and slightly
askew from one another). GeoWall viewers position themselves in front of the
screen and are able to see the images projected in stereoscopic 3D.
FIGURE 15.9 The
basic setup of the
GeoWall—the twin DLP
projectors connected to
the computer and the
polarizing filters in front
of the lenses. (Source:
Courtesy Bradley A. Shellito)
FIGURE 15.10 Imagery
projected onto the screen
by the GeoWall system
(as viewed without the
glasses). (Source: Courtesy
Bradley A. Shellito)