S à 
ned 
the 
on 
  
Cóltekin, Arzu 
  
also create problems in a heavily photo-realistic model using real photographs (Cóltekin et al 1997) although there are 
developments for handling these problems (e.g. using sensors to control the level of detail). 
Linking Graphic Data to the Non-Graphic. There are several ways to make the model more accessible such as using 
objects with defined behavior or hot objects, or determining the levels of detail by using sensors. In this case we have 
used the basic anchor point link from some of the objects. The links in our model carried the objects to the relevant non- 
graphic information and vica versa. The most primitive GIS function of querying graphic and non-graphic information 
from one another is provided already with this method 
3 CONCLUSIONS 
Although yet to be developed to meet the criteria in the field, VRML has something to offer for platform-independent, 
3D and photo-realistic GIS implementations. 
Future research still lies ahead for texture mapping and more interactivity to represent and be able to manipulate 3D 
data remotely. 
WWW: 
Online 
databases vu gs Markup 
Languages: 
HTML, XML, 
GML, VML... 
3D Modeling: 
CAD, Photogrammetry, 
Photo-Realism, 
Quality data 
VRML: 
GeoVRML, 
Availabile, 
Accessable 
3D, Web-based, 
Photo-realistic 
Geographical Information 
The scheme above is showing the relationship between the terms used in the field. XML : Extensible Markup 
Language, GML : Geography Markup Language, VML : Vector Markup Language and HTML: HyperText Markup 
Language. 
Other than those shown above, there are a number of attempts to develop new protocols or environments for 
representing the graphical and non-graphical information in connection on the networks. 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B5. Amsterdam 2000. 147