Map, Journal of the Japan Cartographers Association
Online ISSN : 2185-646X
Print ISSN : 0009-4897
ISSN-L : 0009-4897
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Volume 59, Issue 3
Displaying 1-6 of 6 articles from this issue
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Original Article
  • Error of closure at confluence points on surveyed lines of Ino maps
    Michio NOGAMI
    2021 Volume 59 Issue 3 Pages 1-13
    Published: September 30, 2021
    Released on J-STAGE: September 14, 2023
    DOIhttps://doi.org/10.11212/jjca.59.3_1
    JOURNAL FREE ACCESS
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    The surveying method used by Ino is called as “Dosen-Ho”，a kind of open traverse method. “Dosen”，that is to say，surveyed polygonal lines along coasts and main roads compose a net. Nodes on the net are points of bifurcation and/or points of confluence because the lines are directed. Then errors of closure would be apparent at the confluence points of the surveying lines. This paper deals with the error handling by Ino to make maps. He distributed the revealed error at the confluence point among adjacent points on the newly surveyed line and did not modify existing lines already surveyed.

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