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The 3rd ISPRS Workshop on Dynamic and Multi-Dimensional GIS & the 10th Annual Conference of CPGIS on Geoinformatics
Chen, Jun

ISPRS, Vol.34, Part 2W2, “Dynamic and Multi-Dimensional GIS", Bangkok, May 23-25, 2001
Fig.4: The structure of connect of Geodatabase to implement query and analysis
Filé Scene Operator 3D Operator Flying Operator Query APoVt System
Fig.5: The query of building attribute
A system prototype (CWeb3D) for 3D-city model on Internet is
developed, a test area about 4 km 2 is used to create 3D-city
model through the CWeb3D system. Using the LC model to
construct the building model at the server-side and R-tree
index at database to store the constructed building data. The
client-side downloads the 3D GIS Applet from the server-side
while the city terrain data is downloaded from the server-side.
The user can construct the city terrain and the 3D building
model with texture. Similar to real world, the user can walk
through or fly through along a defined route or navigate by
mouse in the 3D city scene. The user is able to change the
visualization process according to his/her viewing habits, it
provide a interactive process during walking through or flying
through, which allows user to input information during
procedure of visualization to construct a free envision space to
walk or fly in it. Moreover the user can pick the building in 3D
city scene and query the building attribute with SQL statements.
Several experimental results are shown as follow: