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Article: On the uncertainty of local shape of lines and surfaces.
- Article from:
- Cartography and Geographic Information Science
- Article date:
- October 1, 2001
- Author:
CopyrightCOPYRIGHT 2001 American Congress on Surveying & Mapping. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Introduction
Line and surface features of the real world such as streets, coastlines, and terrain, are usually perceived as continuous phenomena. Their digital representation, however, involves the discretization and the subsequent digital reconstruction of the continuum (Goodchild 1992). These processes result in two forms of uncertainty:
* Data uncertainty, caused by imprecise measurement due to vague or ambiguous definition of the phenomenon, or due to technical limitations (erroneous measurement device, precision limitations, error introduced through transformations, etc.: Fisher 1999, Bandemer and Nather 1992); and
* Model uncertainty, ...