312 Chum-Sung-Dae Chum-Sung-Dae was 
constructed in the year 645 AD and is known to be the 
oldest astronomical observatory. It was constructed with 
bricks and has a stable structure with a wide bottom 
and getting narrow as the height increases. As in figure 
2 a ladder leads to the top observatory post through a 
door in the center portion of the structure. 
But recently deformation is reported due to pollution and 
acidic rain following increase in industrial activities of 
surrounding areas. 
  
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Fig. 2 Structure of Chum-Sung-Dae 
3.2 Photograph and Digital Compilation 
of Objects 
Photographs were taken of both Suk-Gul-Am and 
Chum-Sung-Dae. Access to the cultural assets were 
difficult because of restriction by law to attach anything 
on the object itself. Fortunately, past photographs and 
measurement for the Suk-Gul-Am was available but for 
Chum-Sung-Dae only temporary target points were 
used for measurements. Terrestrial metric camera 
SKB-120 was used for Suk-Gul-Am and Rollei-6006 
was used for the Chum-Sung-Dae. The photographs. 
were scanned and the digital photogrammetric software 
of Leica DVP (digital video plotter) was used for the 
compilation and mapping of the structure. The software 
structure is as in figure 3. 
   
  
_.BAT 
DVP.BAT 
( Starter ) 
  
    
  
   
DVPM.EXE 
( Menus ) 
DVPO.EXE DVPO.EXE - SATN.EXE - DVRN.EXE APPLICATIONS 
( Orientation) ( Vectorization ) ( DOS and Others ) 
Fig. 3 DVP Software Structure 
( Starter for other users ) 
   
  
  
The result of compilation after orientation of the 
photographs of the objects are as in the following 
figures. 
  
  
Fig. 4 Result of digital compilation of the Suk-Gul-Am 
612 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B5. Vienna 1996 
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