해상시계 사용 전 유럽 고지도의 본초자오선과 한반도 주변 경도 표기에 관하여

Abstract

When studying the old European maps and nautical charts related to the Korean Peninsula, it is necessary to separate the maps before and after the late 18th century according to the invention of the marine chronometer by John Harrison. Furthermore, the Canary Islands chosen by Ptolemy or Azores Isle or Cape Verde by the discovery of the zero-deviation meridian in the Atlantic Ocean were adopted as the prime meridian, or prime meridians of observatories were used till standardization at the international conferences held in Washington D.C. in 1884. It is also possible to estimate the country of manufacture and the year of publication from the longitude notation of maps and charts before the adoption of the Greenwich prime meridian. The shape and location of the Korean Peninsula are also significantly different due to the inaccurate measurement of longitude prior to the use of the maritime chronometer.