Meridian Longitude -

The breakthrough came from John Harrison, an English clockmaker, who invented the —a clock so accurate that sailors could compare ship time with Greenwich time to calculate longitude. It saved countless lives and made global sea travel reliable.

Meridians and longitude provide a fundamental framework for locating positions on Earth. Accurate use requires clear datum/reference, awareness of measurement methods and potential errors, and appropriate map projections for practical applications. meridian longitude

: The Prime Meridian and its opposite, the 180th meridian, divide the Earth into the Eastern Hemisphere (up to 180° East) and the Western Hemisphere (up to 180° West). Measuring Longitude The breakthrough came from John Harrison, an English