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Author Mor, M. ♦ Lamdan, T.
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Subject Keyword Automatic scanning ♦ Digitizing ♦ Detection and recognition ♦ Topology ♦ Contour lines ♦ Contour maps
Abstract The problem of automatic digitizing of contour maps is discussed. The structure of a general contour map is analyzed, and its topological properties are utilized in developing a new scanning algorithm. The problem of detection and recognition of contour lines is solved by a two color labeling method. It is shown that for maps containing normal contour lines only, it suffices to distinguish between so-called “even” and “odd” lines. The “tangency problem” involved in practical scanning is discussed, and a solution based on minimizing computer memory space and simplifying control program is suggested.
Description Affiliation: Israeli Ministry of Defense, Tel-Aviv, Israel (Mor, M.) || The Weizmann Institute of Science, Rehovot, Israel (Lamdan, T.)
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-08-01
Publisher Place New York
Journal Communications of the ACM (CACM)
Volume Number 15
Issue Number 9
Page Count 4
Starting Page 809
Ending Page 812


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Source: ACM Digital Library