6A-2-4 
Hyperlinks were created in order to connect some objects in the 
scene to relative data. In this approach an Anchor node provided 
hyperlinking. The Anchor grouping node allows hyperlinking of 
any object to an HTML data file or WWW sites. Such an 
interaction between user and data model is independent from 
hardware platform. By specifying any WWW address or HTML 
data file a road sign, for example, can be linked to register 
corresponding to a road sign properties or to road sign database. 
House may also be linked to real-estate databases. 
In practical tests the road signs in the 3D model werhyperlinked 
to the HTLM document describing road signs at the SNRA 
server. In a similar way the road was linked to the SQL database 
at Microsoft TerraServer. A TerraServer site user can seek for 
digital maps or satellite images corresponding to the virtual model 
(Fig 8). 
Figure 8. Hyperlinking SQL database, HTML data file and image 
to VR model. 
6. DISCUSSION AND CONCLUSSIONS 
The approach presented here has been designed to illustrate the 
potential of virtual reality tools in combination with data collected 
with help of mobile mapping technology. This work demonstrates 
one of the ways in which mobile mapping data can be used, 
visualised and combined with other data sources. 
The SNRDB acquires information with different tools and 
methods. Each year the database expands and the files become 
more complex. To perform any analysis the user is often forced to 
work with different datafiles which has different extensions. The 
presented approach could definitely support analysis and decision 
making. The described interface can be employed to permit 
visualisation and interaction with other databases or files. 
Moreover, the interface based on VR tools introduces a high 
degree of realism into any analysis. The proposed interface is 
hardware independent and it can be used via the Internet. 
Symbolic representation of the objects optimises the size of the 
data files required for fast fly- and walk through, also for 
examination of the VR model. Symbolic representation may be 
extended to “realistic” depending on the requirement. 
Basic visualisation and linking problems have been successfully 
solved. The approach of an interface based on MMS and VR has 
been presented. Unfortunately the presented idea is not fully 
complete, it requires modifications and further development in 
order to be implemented into practice. 
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