Uncertainty is a quantitative attribute that represents the difference between reality
and representation of reality. Uncertainty analysis and error propagation modeling reveals
the propagation of input error through output.
Main objective of this thesis is to model the uncertainty and its propagation for
dependent line segments considering positional correlation.
The model is implemented as a plug-in, called Propagated Band Model (PBM)
Plug-in, to a commercial desktop application, GeoKIT Explorer. Implementation of the
model is divided into two parts. In the first one, model is applied to each line segment of
the selected network, separately. In the second one, error in each segment is transmitted
through the line segments from the start node to the end node of the network. Outcomes are
then compared with the results of the G-Band model which is the latest uncertainty model
for vector features. To comment on similarities and differences of the outcomes,
implementation is handled for two different cases. In the first case, users digitize the
selected road network. In the second case recently developed software called Interactive
Drawer (ID) is used to allow user to define a new network and simulate this network
through Monte Carlo Simulation Method. PBM Plug-in is designed to accept the outputs of
these implementation cases as an input, as well as generating and visualizing the
uncertainty bands of the given line network.
Developed implementations and functionality are basically for expressing the
importance and effectiveness of uncertainty handling in vector based geometric features,
especially for line segments which construct a network.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12608845/index.pdf |
| Date | 01 September 2007 |
| Creators | Yarkinoglu Gucuk, Oya |
| Contributors | Duzgun, H. Sebnem |
| 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 METU campus |
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