A great interest in 3-D modeling in Geographic Information Technologies
(GIS) has emerged in recent years, because many GIS related
implementations, ranging from urban area design to environmental
analysis require 3-D models. Especially the need for 3-D models is quite
urgent in urban areas.
However, numerous applications in GIS only represent two-dimensional
information. The GIS community has been struggling with solving
complex problems dealing with 3-D objects using a 2-D approach. This
research focused on finding most accurate method which is used for
getting height information that is used in 3D modeling of man made
structures in urban areas. The first method is estimating height
information from floor numbers of the buildings data from municipal
database systems. The second method is deriving heights of buildings
from Digital Elevation Model (DEM) that is generated from stereo satellite
images. The third method is measuring height values of the buildings
from 3D view of stereo IKONOS satellite images by operators. The
comparisons between these three methods are done with respect to
height data collected from field study, and according to these
comparisons, the amount of the error is determined. The error is
classified according to floor numbers of buildings, so that, the quantified
errors can be applied for similar works in future. Lastly, the third method
is utilized by the assistance of 10 people who have different experience
level about 3D viewing, in order to see the error amount changes
according to different operators. Several results are presented with a
discussion of evaluation of the methods applied. It is found that, if there
is an updated floor number database, obtaining building height is the
most accurate way from this database. The second most accurate
method is found to be getting height information by using 3D view of
stereo IKONOS images through experienced users.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12609097/index.pdf |
| Date | 01 December 2007 |
| Creators | Ergin, Ozge |
| Contributors | Duzgun, Ozge |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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