ht 
d 
o wd 
  
  
(c) Culture and entertainment class 
Lists and the Tel. Nos. of the following classes: 
Cinemas and theaters; Museums; Parks. 
523 Newly increased users' feature object class of 
the GIS data model 
Supplementary user-oriented feature object class of the 
GIS data model — due to missing or updating of the data 
the user-oriented feature objects may be supplemented 
by users organizations themselves or by the software 
supplier according to the purchasing contract. 
New user-oriented feature obiect class of the GIS data 
model — due to the extension of the GIS applications an 
extended new user may be added. The supplementary 
user-oriented feature units should be supplemented by 
the software supplier. 
We will define a general rule here, i.e., we will take the 
various users requirements as the standard for each 
step, such as: data acquisition, various input for the GIS 
database and designing the user-oriented feature 
objects. As the time goes on the data in the GIS should 
be madified, supplemented or updated according to the 
practical situation as soon as possible. 
6. Conclusions 
In the last decade a software revolution had been quietly 
started in the OOP languages in computer science. In 
this paper we have discussed and analyzed some 
important concepts of the GIS related items, such as: the 
OOP languages, the VB language, GUI of windows, the 
dynamic applications of the OOP languages, the object- 
oriented database and three classes of an object 
oriented and user-oriented data model as an example. In 
GIS all the object can be composed by the geometric 
points, lines, polygons and their semantic attributes 
which can be displayed graphically and/or output by the 
hardcopies with limited semantic notations on them. Ali 
the semantic attributes of the GIS can be queried by its 
softwares and also can be displayed and/or printed for 
various users needs. Pictures displaying, such as: 
scenic view from various viewpoints is possible. This 
paper is a part of a research project “Adapting GIS to 
the changeable world, dynamic applications, quicker 
queries, convenient analyses and powerful semantic 
retrieval of attributes for a better world”. We are now in 
the process. 
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996