2. MAKING THE STEREO-MAP
With transformation of two-dimensional map into the
shape, as it could be seen from two points of
viewing for each eye, we actually seperate the map
into two stereo-pairs. To make a set of two
stereopairs we have to calculate parallax distance
for each node of elements on the map. First we
have to add height component to the topographical
data. For the map made in digital vector format we
use DEM, which can be also height extended. If
DEM does not exist, we can generate it from
contours and other height points. Then we drape
topographical data of the map on the DEM - each
node gets its height coordinate. If we know the
height of all nodes of the elements and if we appoint
a base distance and height of our observation, we
could calculate and move each node for a value of
parallax difference - we get the right stereo-pair of
the map. Set of the left and the right stereo-pair
creates stereogram of the map - stereo-map.
Figure 2: Making the digital elevation model (from contours and height points with added high component
generated triangular irregular network - TIN)
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Figure 3: With moving the map elements for calculated value of the parallax difference we get the stereo
map.
