CIP A 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
mouse/cursor/keyboard combinations) can be sent from the
VRML scene nodes where they are detected to Java programs
that react correspondingly. The converse is possible too.
Once the all CAD drawings has completed and stored as DWG
AutoCAD file format and imported into ArcGIS 8.x technology
products. “3D Analyst”, which is one of ESRI’s ArcGIS 8.x
extensions, has been used to create VRML output files for the
historical site. VRML output obtained the integration of CAD
and GIS technologies is of particular importance to the
historical documentation with so many objects that are recreated
in CAD packages due to standalone GISs lack the graphical
capability and geometrical accuracy. In this project the
approach to CAD/GIS integration is that CAD tools would be
used to create, edit, and maintain graphical information. GIS
tools would be used to model and analyze the data related to the
geometrical information. The integration seems appropriate
since both systems are meant to deal with spatial information.
This output is stored in a data file external to the GIS, which is
then loaded into a suitable VRML browser for viewing. The
browser provides the functionality for the user interactively to
explore the 3D model by "walking" and "flying". The user is
unable to modify the model in the browser. Modification of the
model requires going back to stage one, making changes to the
2D GIS database, and then generating a new VRML model.
However, this output (being program generated) tends to be
large and cumbersome, often unusable for web delivery. Once
you get started, it's actually easier to create effective VRML
representations yourself using much simpler tools. (With some
guidance, a third-grader was able to create a significant VRML
world in an hour using only a text processor.) The output
becomes small enough and efficient enough to be of practical
use for serving GIS data in three dimensions over the web.
4. Conclusion
This study is focused in the reconstruction of the fortresses of
“Seddulbahir” and “Kumkale” and the cemetery of “Kumkale”
in the virtual environment. This application helps the project
members, architects, archeologist and art historian to centralize
database, predicts the cultural heritage after recreation and
provides history information for people who are interested in.
Therefore, this study is very interesting for tourists and people
who are trying to discover the past.
Another goal of the study is to show that high quality 3D data
can be easily produced and viewed in a web browser format and
that useful 3D online libraries of geographic data can be
compiled. This goal was successfully achieved. It should be
noted that VRML is a fairly large language and the possibilities
of what can be built into the scene is really only limited by the
creators imagination. There are many things that could be added
to these scenes to make them more interactive or informative.
This is the first part of the research for displaying and viewing a
historical object by using virtual reality concept and a
geographical information system, and these two modules can be
worked in the Internet and linked together with hyperlinks and
internet programming in the WWW system. In the research part,
VR and 00 (Object Oriented) are together applied to model the
historical objects. An object oriented approach has many
advantages such as objects are independent and reusable. Next
step addressed for designing recreation using object oriented
and virtual reality approach. Spatial database query is in which
the development interface will include a geo-referenced
multimedia resource base.
The historical scenario created in this research was derived from
investigating of “life history of the fortresses”. Historical
documents, archaeological evidence, as well as imaginations
were in dispensable in the completion of the work. The object
oriented approach and GIS are tools for helping historians to
investigate the best model and virtual reality is a visualization
technique to present the model in 3D with navigator.
Many of the commercial GIS vendors are now realizing the
possibilities of 3D GIS using virtual reality technologies. For
example ESRI Inc. was launching a powerful 3D extension to
their desktop GIS, ArcGIS 8.x technology - 3D Analyst
extension.
Acknowledgement
It is due to the generosity of the Foundation Max van Berchem,
the National Endowment of the Humanities, the American
Research in Turkey, Leica Computer Systems and Technical
Services and the Vehbi Koc Foundation that we were able to
accomplish as much as we did over the past five years and all
members of the Seddulbahir-Kumkale team give our sincere
thanks to our sponsors. We would also like to thank the Turkish
Ministry of Culture, the Director of Museums and Monuments
and the Ministry of Defense for granting our team permission to
research the sites of Seddulbahir and Kumkale.
References
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Giiney, C., £elik, R. N., 2003, Multimedia Supported GIS
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Koehnen, R. T., 2002. Building 3D Geographic Models in
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