CIPA 2003 XIX"' International Symposium, 30 September - 04 October, 2003, Antalya, Turkey 
723 
the hypothesis of a former temple located at the top of the 
hillock Kuyiikkale (see also Figure 9) one can calculate the 
maximum height of the former theatre platform if one assumes 
that the platform should not be an obstacle for the theatre 
visitors. The result of this calculation is, that the visitors had the 
temple in their view field while joining a theatrical performance 
if the platform was not higher than 9 metres. 
Figure 8. Principle of line of sight analysis (left), 
line of sight analysis at the Tavium theatre (right) 
Figure 9 shows the complete landscape area which could be 
overlooked by the theatre visitors. 
Figure 9. Visible terrain for historical theatre visitors 
Visibility analysis can be used for many other purposes, like for 
the detection of suspected watchtower locations which were 
needed to control a certain area, for an analysis to answer 
questions like ‘from which points of the ancient trade roads was 
it possible to see the city?’, ‘from where could a certain 
religious building be seen?’ or, in turn, ‘where is the most 
probable location of a religious building which is assumed to be 
seen from a certain area?’. 
4.4.3 Other DEM applications: The slope as an important 
terrain measure is strongly linked with many archaeological 
research items, like landuse considerations, for instance, 
because agriculture or building construction may be restricted 
to a maximum terrain slope. Natural erosion processes strongly 
correlate with slope measures, artificial slopes may have been 
created to improve the defence capabilities against attackers, 
steepest path calculations can help to discover remains of 
irrigation systems. All slope calculations needed in such cases 
can be performed very easily once a DEM is available. 
Automatic cross section calculations can be used for the 
validation of suspected courses of paths, roads, rivers, etc. 
Visualisation is another wide DEM application field which will 
be discussed shortly in the context of the Internet presentation 
of the Tavium Research Project (see next section). 
5. TAVIUM RESEARCH PROJECT WEBSITE 
Meanwhile, the Internet became a standard medium for 
information exchange. The advantages of this new medium are 
obvious: information can be accessed all around the clock from 
everywhere in the world, the contents of websites can be 
updated easily within a very short time span, all information is 
provided at a relatively low cost level as compared to classical 
print media, but still at a considerable size, etc. In some way a 
certain standard of how to structure and to present information 
on the Internet is already available. A website for the Tavium 
Research Project was created which meets the requirements of 
all the de facto agreements with regard to the arrangement of 
information on the screen, to the navigation through all pages, 
to the use of commonly used icons and other components of a 
widely accepted Internet look and feel. 
5.1 Website Design 
A flat hierarchy of categories was established to facilitate the 
navigation on the website (see Table 3). At the moment of 
publication the website contains more than 150 Internet pages. 
Actually, the pages are only available in German language, but 
the intention is to provide the presentation in English language, 
too, and, possibly, even in Turkish language. Figure 10 shows 
the front page of the Internet presentation. 
Category 
Subcategory 
Front 
page 
Home 
• General 
• Site map 
• Information 
News 
• Field campaign 
2002 
• Credits 
Project 
• Aims 
• Management 
• Co-workers 
• Co-operation 
• Sponsors 
Region 
• Natural 
environment 
• Traffic 
networks 
• Research area 
Tavium 
• Walk around 
• Location 
• Research 
history 
• Topography 
• General history 
• Cults 
Category 
Subcategory 
Research 
• Field 
campaigns 
• Surveying and 
Geoinformatics 
• Field research 
• Excavations 
• Findings 
• Results 
Images 
• Region 
• Büyükknefes 
• Tavium 
• Findings 
• Measurements 
• Models 
• Maps 
Literatur 
e 
• Tavium 
• The Galats 
• Full texts 
Links 
• Related 
websites 
• Tips 
Contact 
• e-mail 
Logout 
Table 3. Design of the Tavium Research Project website