Simulation of error distribution for handling positional uncertainties in geographic information systems | |
| Author | Zhang, Lei |
| Call Number | AIT Thesis no.RS-05-10 |
| Subject(s) | Geographic information systems Geographical positions |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Plane line segments is one of the basic features in two-dimensional vector GIS, and its error model has been one of the key issues for positional error modeling of GIS features. Random error within a certain region can be used to describe the error distribution effectively; the probability analysis can thus be used as one of the solutions to error distribution of a plane line segment. This paper gives a discussion on several positional error models for line segments in GIS. The probability density function of a line segments is derived using stochastic simulation method with the assumption that the errors of the endpoints follow two-dimensional normal distributions, and a stochastic generator for the two-dimensional normal distribution points has been also given in this paper. The approach applies random endpoints to generate random line segment in order to simulate the error model and it is more efficient than previous manual digitizing. In this study, the models cover the cases where two endpoints are either independent or dependent to each other based on both accuracy and reliability theories, also including the cases that the distance between two random endpoints in a line segment is close enough. |
| Year | 2005 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Remote Sensing (RS) |
| Chairperson(s) | Chen, Xiaoyong |
| Examination Committee(s) | Kusanagi, Michiro;Borne, Frederic |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2005 |