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Figure 9: The effect of the protected area in the 3D view
of the flood zone
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Figure 10: Project structure
5 AR IN GEO SCIENCES
The project "Advancement of Geoservices?" aims at de-
veloping an overall concept for acquisition, management,
usage and visualisation of geodata for mobile geoservices
(Breunig et al., 2003a, Breunig et al., 2003b). The project
is subdivided into four working groups. The database group
is developing web based GIS components for online access
of spatio-temporal objects. Others do research on mobile
data acquisition, usage and analysis and the definition of
standardized interfaces for geoservices. Our group is de-
veloping an "Augmented Reality GIS Client" for online
visualisation, processing and acquisition of 3D datasets.
À use case was chosen in the field of Geosciences as the
application frame. The AR system allows for the visualisa-
tion and measurement of underground geo objects in a mo-
bile real time environment which makes it possible to anal-
*The research project "Advancement of Geoservices (Weiterentwick-
lung von Geodiensten)" has been fundet by the German Ministry of Edu-
cation and Research (BMBF)
1053
yse geological and geomorphological processes directly in
the terrain. To show the utility and feasibility of such a sys-
tem, data of a project investigating landslide processes will
be used. Data are made available by the Landesamt für Ge-
ologie, Rohstoffe und Bergbau (Land Office for Geology,
Resources and Mining) in Freiburg i.Br, Germany. The
investigation site is an area of mass movement on the Alb
which has to be routinely monitored due to a road cross-
ing the risk area. Data are available as points, lines, three-
dimensional landslide bodies, DEM and attribute data. The
AR system can help in data acquisition and assessment
of the current state of the movement by visualising addi-
tional data like geological structures, soil parameters, bor-
der lines and textual information. The application scenario
can also provide data in 4D (several epochs of data have
been gathered in the past), which will be stored into the
4D database system being developed by the database group
and therefore allows to "see" the landslide moving in the
past. This application scenario allows to show the inte-
grated use of the joint developments based on a common
architecture, 2D real time data display and collection, AR
based display and data collection based on a common 4D
Geo Database.
6 CONCLUSIONS
Augmented reality is an appropriate technology for use
cases, where people need additional spatial information
on-site. Today's HMDs are already capable of overlaing
the display information directly into the user's vision and
once head tracking and navigation systems become small
and affordable enough the technology will be adopted in
many applications.
Disaster management is just one of these applications that
benefit from AR. In the case of high water management,
predictions from hydrological simulations of water surface
models, directly visualised with real video images, help
understanding the situation in the near future. This under-
standing makes it easier for disaster management to pre-
pare preventive measures like the placement of mobile wa-
ter protection walls.
REFERENCES
Azuma, R., Baillot, Y., Behringer, R., Feiner, S., Julier, S.
and MaciIntyre, B., 2001. Recent advances in augmented
reality. IEEE Computer Graphics and Applications (6),
pp. 34-47.
Breunig, M., Malaka, R., Reinhardt, W. and Wiesel, J.,
2003a. Advancement of geoservices. Technical Report 2,
Geotechnologien, Hannover.
Breunig, M., Malaka, R., Reinhardt, W. and Wiesel,
1, 2003b. Entwicklung mobiler geodienste. In:
L. Bernard, A. Sliwinski and K. Senkler (eds), Geodaten-
und Geodienste-Infrastrukturen - von der Forschung zur
praktischen Anwendung, IfGI, Münster, pp. 253-264.
