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Erich Brechner made the source code of his original 
program available to use, so that the newly collected data 
could be implemented. In addition to the three slabs we 
also included part of the back-wall which supports the tops 
of the slabs. This part of the wall cuts off the sundagger 
and, therefore, is an important component of the site. 
Figure 5 shows the shadows of the slabs which were 
generated by the named program using the 3-dimensional 
points we compiled photogrammetrically. 
  
Figure 5: The Sundagger projected onto the back wall in a computer simulation. 
Figure 4: Shaded view of the Sundagger-Site model in MicroStation.