Analysis of local distortions in a historical map "Rakuchu-Ezu"

TSUKAMOTO Akihiro
ISODA Yuzuru

The purpose of this study is to examine the accuracy of "Rakuchu-Ezu" circa 1642, a map of Kyoto drawn in the early Edo period. This map is reportedly a survey map. However, previous studies for this map suggest non-uniform scale and inaccurate surveyed values. This study systematically measures the distortions in the map and analyzes the overall and local precision of the map using GIS. Along side the large margin of distortions in the northern and the southeast part of the map as reported existing literatures, local variation in accuracy and spatial clusters having similar common coordinate distortions have been identified.

Theory and Applications of GIS

Geographic Information Systems Association

15

2

10.5638/thagis.15.111

https://doi.org/10.5638/thagis.15.111
http://ci.nii.ac.jp/naid/10020029680
https://jlc.jst.go.jp/DN/JALC/00305399397?from=CiNii