A generic statistical approach for modelling error of geometric features in GIS
作者:
WENZHONG SHI,
期刊:
International Journal of Geographical Information Science
(Taylor Available online 1998)
卷期:
Volume 12,
issue 2
页码: 131-143
ISSN:1365-8816
年代: 1998
DOI:10.1080/136588198241923
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
This paper describes a newly developed statistical approach for modelling positional error of geometric features in GIS. The generic statistical models for N-dimensional features are firstly derived. The models for one- and twodimensional features are then developed as the specific cases of the generic models. In each dimension, the GIS features are classified as points, line segments and line features. Because of the errors, features stored in GIS may not correspond with their actual location in the real world. The true location of a GIS feature is only known within a certain area around the represented location in GIS. This newly developed approach can be used to provide a statistical description of such areas. For one-, two- and N-dimensional GIS features, they are defined as confidence intervals, confidence regions and confidence spaces respectively. The areas are related to the positional errors of the composite points of the features and to the predefined confidence level. The models are derived based on the assumptions that the errors of the composite points are independent and follow multi-dimensional normal distributions.
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