| Author | Tseng, Chien-ming |
| Call Number | AIT Thesis no.GT-90-10 |
| Subject(s) | Urban transportation
|
| Note | A Thesis submitted in Partial Fulfillment of the Requirement for
the Degree in Master of Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-90-10 |
| Abstract | Most of urban planners recognized the zone system as
one of the fundamental units for urban analysis. On the view
point of statistics , the zoning error , which inevitably
occurs through the aggregation of individual information
into zone data, has a big influence on the urban analysis.
Moreover , when we utilize an empirical data set to analyze
the effects of spatial aggregation problem, it already
includes some original error that comes from the outside of
the pure science of zoning system.
Therefore , this study utilized an artificial data set
instead of empirical data set and try to provide a general
analysis on the relationship between the zoning error and
the level of aggregation (the number of zones ). It is
believed that an unbiased results can be obtained by the way
of random number generating data input. And the production constrained gravity model was applied throughout this study
to provide a consistent analysis.
The zoning error was displayed by three kinds of error
indications, namely : Root-mean square error, Relative Root-mean square error and Dis- similarity index. All the three
kinds of error indications successfully show the
relationship between the zoning error and the level of
aggregation. And it is concluded that the zone system of
lower zone number possesses not only higher zoning error but
also larger range in its distribution; and the zone system
of higher zone number possesses not only lower zoning error
but also a more concentrated distribution. The convergence
can be achieved with increasing the number of zones.
In this study, all the calculations were done using the
machine of net work station NEWS-1850. There exists the
limitation in capacity of the machine used. However, it is
believed that the results obtained here are representative
of the effects on spatial aggregation problem which would
similarly be obtained from similar experiments done with
larger data set. It will be interesting for future research
to explore this problem by adopting an empirical data set
which includes a sufficient amount of spatial basic units
(BSUs } . |
| Year | 1991 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-90-10 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Fukuda, Atsushi |
| Examination Committee(s) | Yordphol Tanaboriboon ;Honjo, Yusuke ;Mori, Hiroshi
|
| Scholarship Donor(s) | The Government of the Republic of China ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1991 |