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East Gymnasium. The vector data have been generated
by digitizing and generalization of existing paper plans.
The original plans carry individual local coordinate sys
tems in different scales, and with different orientation. It
is decided to gradually convert all relevant data of the
excavations and of research to the new spatial reference
co-ordinate system.
Technical Statement: Digital Orthophotos are well
suited as spatial reference co-ordinate system for archeo
logical and other similar information systems.
Financial Statement: Storing various types of informa
tion in the same spatial information system allows for
distributing the relevant costs among different groups of
its users.
200 m
Figure 5: Digital Orthophoto of Ephesos with the ancient East Gymnasium
8. HERITAGE DOCUMENTATION SYSTEM
FOR THE SCHONBRUNN CASTLE
The castle Schonbrunn is one of the major attractions in
Vienna. It has about 6.7 million visitors per year
(http://www.schoenbrunn.at). Permanent restoration
activity is inevitable for preserving this jewel. The sup
porting documents needed are created by applying photo-
grammetry. Fig. 6 shows a small section of the facade.
Vector data are compiled in considering both metrics and
topology (Kraus, 2003). Concerning local building condi
tions, the orthophoto yields valuable hints and informa
tion.
21
