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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanbul 2004 
  
  
  
Figure 3. Sample for a super elevated antique Drawing caused by conventional stereo photography. This is Keystone Masterpiece 
Nr.2595 of Medinet Habu, Theben (Eqypt), showing the lion hunting on the wall of the temple of Ramses III, courtesy 
www.stereoview.forU.de 
The ISU has 900 members from 32 states and is open for 3D 
amateurs as well as for professional stereo photographers and 
offers many stereo links in the wide web presentation. 
To give an idea of the great job, which has to be carried out for 
a systematic searching for existing stereoviews, as an 
impressive example, the google search machine shows 2.3 
Million (!) results for the keyword "3D photography" and for 
the keyword "stereo photography still 700000 results! 
This survey does not even include the analog staff and though in 
many Archives and collections the digitization process has 
already started, it is estimated, currently at least some million 
historic analog stereo views still wait for digitization and for 
modern Spatial Heritage representation for restoration and 
comparison purposes etc., see samples in Figure 3 and 5. 
It is highly recommended, to digitize the available handed 
down stereoviews systematically and to store them on modern 
storage tools, like on CD-ROM, DVD etc. The aim is, to 
protect the (analog) originals by digitizing it once with an 
appropriate pixel size, "near real" and in particular even to 
improve the image quality by separate removing of speckles and 
scratches etc. and by increasing the radiometric appearance of 
the (now digital) stereo views. 
For "daily" applications the digital print of such images seems 
to be sufficient, while the original is kept for exclusive 
operations. 
Due to very high resolution requirements from the Heritage 
protection side, so far still conventional cameras are in use for 
documentation purposes in conservation. 
CCD-Cameras, recently showing about 3 until 10 Mega-Pixels, 
can almost(!) replace slide cameras. Their radiometric accuracy 
(color truth) is already superior. 
The Konica Land Master GPScamera shall be mentioned as the 
first public camera, which records additional frame information, 
including the position, the date and time and the imaging 
direction belonging to that particular photography. The. Konica 
Land Master GPScamera as introduced occasionally the ISPRS 
congress in Vienna in 1996 is linked to a data base, screening 
the position and the (compass-) direction of every photography 
in a map. 
  
Figure 4. Keystone View Company Masterpiece Nr. 27726: Historic stereoview of the Rumeli Fortress: along the Bosporus. 
"Asia in the Distance". The fortress was built to control and to protect the Bosporus. Istanbul, Turkey 
385