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Proceedings Paper

COM-based expert system for map projection selection
Author(s): Hu Zhao; Haihong Zhu; Lin Li; Yong Xing
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Paper Abstract

Map projections are attempts to portray the surface of the earth or a portion of the earth onto a flat map surface. This can not be done without any distortions of conformality, distance, direction, scale, and area. There are many map projections, and each of them has its own set of advantages and disadvantages. The mapmaker must select the one best suited to their application needs, reducing distortion of the most important features. However, how to select a 'proper' map projection is a complex process involving general evaluation of map projection alternatives based on a set of characteristics that describe these projections. And this process needs a systemic understanding of map projection, which usually can not be achieved by end users. This paper introduced Expert system (ES) to solve this problem, and used Component Objects Model (COM) technology to develop and interoperate the proposed system (developed with Visual Prolog 7.0 Personal Edition®) with professional Geographical Information System (GIS) software. As an essential part of the article, the authors also represented the knowledge, rules and reasoning methods of selecting an appropriate map projection as well. Implementations and examples had been given to testify the feasibility.

Paper Details

Date Published: 1 August 2007
PDF: 10 pages
Proc. SPIE 6751, Geoinformatics 2007: Cartographic Theory and Models, 675115 (1 August 2007); doi: 10.1117/12.759722
Show Author Affiliations
Hu Zhao, Wuhan Univ. (China)
Haihong Zhu, Wuhan Univ. (China)
Lin Li, Wuhan Univ. (China)
Yong Xing, Jiangsu Provincial Bureau of Surveying and Mapping (China)

Published in SPIE Proceedings Vol. 6751:
Geoinformatics 2007: Cartographic Theory and Models

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