Supplement 4: Comparison of Ptolemy's and Pseudo-Arrian's coastline length data

Supplement 4 to the paper "<strong>The Configuration of the Pontus</strong><strong> Euxinus in Ptolemy’s <em>Geography</em></strong>" submitted to the History of Geo- and Space Sciences (URL: https://www.history-of-geo-and-space-sciences.net). The paper is a part of the research project “Development of the Methods for Analysis of the Historical Maps” supported by the Russian Foundation for Basic Research (grant 18-011-00258-a). <em>Correspondence</em>: Dmitry A. Shcheglov ([e-mail]).本材料为提交至《地理与空间科学史》（History of Geo- and Space Sciences）的论文**《托勒密〈地理学〉中彭图斯-攸克辛海（Pontus Euxinus）的形制》**的补充材料4，相关论文链接：https://www.history-of-geo-and-space-sciences.net。本论文隶属于俄罗斯基础研究基金会（Russian Foundation for Basic Research）资助的「历史地图分析方法开发」研究项目，项目编号为18-011-00258-a。*通讯作者*：德米特里·A·什切格洛夫（Dmitry A. Shcheglov），邮箱：[e-mail]。