International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B4. Istanbul 2004
Photogrammetry is economical way to provide true height
values, which is required for 3D city modeling. Since, OC
collecting the data 1s costly and very hard, 2D and 2.5D
photogrammetric maps are used as base. Therefore, accuracy
of the city model is based on the accuracy of the base map.
Since existing maps are not containing data about the roofs of
the building, it is recommended to gather required data
during production of the maps and to take this as a common
rule. Otherwise same procedure will be done repeatedly and
data will be duplicated.
Because, the collection of the data required for the 3D city
models is very costly, using existing data is became current
; : oy - Js . | KEY W
issue. But using existing data directly in 3D model generation
might be full of errors. Especially buildings, which are the |
main objects of the 3D city models, have distinct errors. | ABSTR
Using the data without editing will cause X, Y and Z errors in | |
the 3D city models. Additionally, view of the model will be
uu = Currentl
different from the real world shapes. ;
process
; : 5 velopt
In order to generate accurate and precise 3D city models from | develop
istine - ; ; (CCD) c
the existing photogrammetric maps, the data should be edited ;
horizont
Tool (A
faster an
the same
as required.
REFERENCES |
|
Emem, O., 2002a. 3D Modelling, Design and Application.
MSc. Thesis. (in Turkish), Yildiz Technical University,
Istanbul
Emem, O., Yastikli, N., Balik, F., Alkis, Z., 2002b. Creating | Develop
3D Photo Realistic Models for Visualization of Historical | requires
Buildings. 3" International Symposium Remote Sensing of | building
Urban Areas, Istanbul | acquisiti
| Recent y
Forstner, W., 1999. 3D-City Models: Automatic and | modellir
Semiautomatic Acquisition Methods, Photogrammetric | develop
Week, Wichmann, Karlsruhe | example
| complic:
Griin, A., Wang, X., 1999. CyberCity Modeler, a tool for
interactive 3-D city model generation. Photogrammetric | The sec
Week, Wichmann, Karlsruhe Textures
| improve
Ózmutlu, S. 2001. 3D Geoscientific Modelling, 3D | as a sub
modelling, Principles. Applications Course Note, 3D Model | geometr
Building & VRML, p.p 1-16. | documer
image ac
Yastikli, N., Jacobsen, K., 2003. Automatic Digital Elevation
Model Generation, Problems and Restrictions in Urban | The aim
Areas. Journal of Yıldız Technical University, Vol. 2003-2 | producti
pp.38-46 | terrestri:
| cover de
Zlatanova, S., Tempfli, K., 2000. Modelling for 3D GIS: | modellir
Spatial Analysis and Visualization Through The Web. | facades
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