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information is derived from. The input of scanned 
pictures or photographs is decided to be limited at 
the time being, e.g. one or maximum two pictures for 
each Castle and only in special occasions more than 
that. It is mentioned here that for a picture 10x10cm 
scanned at 300 dpi a storing space of about 1.4 Mb is 
needed. In the future, an optical disk that will be 
loaded on the computer, will permit a larger number 
of raster pictures to be stored into the system. 
The editing of 2D or 3D graphical information, where 
necessary, is obtained by using AutoCAD package and 
the final products are transferred into the special 
Information System. 
3 SIRUCTURE OF THE SYSTEM 
The user can enter into the system, working in 
ARC/INFO environment, in two ways: 
a)by asking for information related to a single Castle 
b)by selecting queries related to more than one 
Castle. 
when a user is interested for information related to 
a single Castle can either obtain information as 
listed in the ten groups mensioned above or combined 
information selected from queries menus. 
The information is structured in such a way in the 
system, that the user can start from every group and 
proceeds to any record of interest, continuing to a 
more specified graphical, alphanumeric or image 
information. The user could reach these elements by 
starting from any related group. It is obvious that 
every piece of original information is stored only 
once. 
     
  
   
   
   
  
  
   
   
  
  
   
  
   
  
   
  
   
  
  
  
  
   
  
    
        
    
To withdraw information of a particular attribure 
related to more than one Castle, the user follows a 
procedure of selecting queries through succesive pop- 
up or other menus containing all type of information 
(archaeological, historical, spatial e.t.c.) or certain 
combinations of that. For example, a certain kind of 
question can offer information related to dates (e.g 
Which Castles were built in the 18th century), or 
positioning (e.g. The Castles of Crete), or combined 
information (e.g. The Castles of Peloponissos that 
were occupied by Venetians) et.c. 
4. APPLICATION 
Some examples of the operation of the special 
Information System are given below. For that purpose 
we follow a user who is interested in acquiring 
information for a Castle of Peloponissos. 
The user first obtains from the system the map of 
the region with all the existing Castles marked on it. 
The Castle of Acrocorinth is selected, which is the 
oldest Castle in continous use in Greece after the 
Acropolis of Athens; it is found southwest of the 
ancient city of Cotinth. 
By selecting the particular Castle, the user obtains 
the menu with the ten groups, as shown on Fig. 1. 
On Fig. 2 we have a typical example of an output in a 
form of alphanumeric list. This is the first screen of 
the answer of the system to the selection of group 
"General information". 
  
X=-8.150m Y=16.500m 
575 m 
240.000 sm 
SOUTHWEST OF CORINTH 
YES