International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B4. Istanbul 2004
4.2 GeoPro™
In our next example application, GeoPro*, the visualisation
of the terrain is not the primary goal of the application, but it
is still a very important part which adds understanding to the
created scene.
The goal of GeoPro”” is the visualisation of the ground water
table and hydro geological layers in combination with
planned construction sites. The visualised region is usually
fairly small.
When starting a GeoPro"? project the user loads the region he
is interested in into the 2D map of GlSterm. There he must
select ground water measuring points, which are available
through the ground water data base. Additionally he needs to
digitise the planned buildings in the 2D map. With this
information GeoPro?P creates a virtual scene with the
following content:
e The ground water table is visualised in three ground
water layers with information from the ground
water database.
e Hydro geological layers are additionally created
from the information of the ground water database.
e The data for the terrain layer is selected with the
Height-Service out of the database. Usually the 5 m
high resolution DEM of Baden-Württemberg has
the appropriate resolution.
* A building layer is created with the user digitised
information from the 25D view. The building is
placed on top of the terrain.
Fig. 7 shows a virtual scene created with GeoPro?P,
isi disy GISterm SUM ER" os
.GiSterm Karte. Ihema Diagramm Grafik Extras RIPS 30 Men
sa@eacaa ot rEg
SenPro302 |
bruchhausen: 19946 bytes... Position 345370944,541071128 Maßstab 4: 10923 |
Fig. 7 Scene created with GeoPro^?
GeoPro?? provides several analysis possibilities of the scene,
like clipping the construction site for detecting conflicts with
the water table or creating 2D view profiles for visualising
the run of the hydro geological layers. The visualisation of
the textured terrain adds a realistic impression into the scene,
which helps the user to understand the visualised analysis
tasks.
5. CONCLUSIONS
This paper discussed data handling and visualisation
techniques for the integration of high resolution digital
elevation models into 3D GIS systems. These techniques
were adopted successfully for two different visualisation
applications of the Environmental Information System of
Baden-Württemberg. The used techniques are generally
transferable to other examples.
6. REFERENCES
AJA, 2004, Projekt AJA (Anwendung JAVA-basierte
Lösungen in den Bereichen ‚Umwelt Verkehr und
Verwaltung), http://www.lfu.baden-
wuerttemberg.de/Ifu/uis/forschuhg/, (accessed April 2004)
#
disy, 2004, disy, http://www.disy.net/de/start_de/index html,’
(accessed April 2004)
Hibbard, 2004, :
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2004)
Hilbring 2002, Projekt AJA, Anwendung Java-basierter
Lösungen in den Bereichen Umwelt, Verkehr und
Verwaltung, Phase IN 2002, GISterm3D —
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S. 37-56 in Mayer-Fóll Keitel, Geiger (Hrsg.),
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Hofmann, Veszelka, Wiesel, 1999, Projekt GLOBUS, Von
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globaler Umweltsachdaten im Umweltinformationssystem,
Baden-Württemberg und anderen fachiibergreifenden
Anwendungen, Phase VI 1999, GIStermFramework — das
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79 in Mayer-Fóll, Jaeschke (Hrsg.), Wissenschaftliche
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Hofmann, Hilbring, Veszelka, Wiesel, 2000, Projekt AJA,
Anwendung Java-basierter Lösungen in den Bereichen
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IPF, 2004, Institut für Photogrammetrie und Fernerkundung,
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Java 3D, 2004, Java 3D API,
http://java.sun.com/products/java-media/3D/, (accessed April
2004)
Java 3D Tutorial, 2004, Dokumentation Collateral,
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LfU, 2004, Landesanstalt für Umweltschutz,
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