Resolving Spatial Conflicts In Computer-Generated Collision Diagrams For Road Accident Analysis
This research deals with the depiction of road accident scenes using symbols. When cartographic symbols are presented, there may be situations where they are either too close or overlapping. Manual intervention is thus needed to rearrange the symbols to avoid confusing the user. This condition,...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2002
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| Online Access: | http://psasir.upm.edu.my/id/eprint/12074/1/FK_2002_40.pdf |
| Summary: | This research deals with the depiction of road accident
scenes using symbols. When cartographic symbols are presented,
there may be situations where they are either too close or
overlapping. Manual intervention is thus needed to rearrange the
symbols to avoid confusing the user. This condition, known as
spatial conflict, is part of the problem in cartography especially in
the process of automated generalization.
When a collision diagram is drawn to show the road user
movements (RUM) that indicate the nature of vehicle maneuver in
road accidents at a particular site, the position of the event is often
re-Iocated because of the type and size of symbols used. The
changes made are always tentative, iterative and subjective. It is also a time consuming process, as the draughtsman need to decide
the right and accurate symbols to be presented. These processes
are needed, as the symbols are usually close or overlapping against
each other. The diagram may not be much helpful to the traffic
engineer if no intervention is being made to re-position the
symbols. A clear and informative diagram is necessary to
determine the predominant type of road accident, and for
proposing the best remedy. Therefore, the procedures in the
creation of Collision Diagram involve an iteration process which are
subjective due to an array of human factors involved in making
decisions. As a result, inaccuracy occurs in presenting the right
position and the right symbols. Hence this work focuses on the
automation process for resolving the spatial conflict. |
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