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.