longituds

Longitude is a geographic coordinate that specifies the east-west position of a point on the Earth's surface. It is measured in degrees, minutes, and seconds, with 360 degrees in a full circle. The prime meridian, which runs through Greenwich, England, is the reference point for longitude, with 0 degrees longitude. Longitudes to the east of the prime meridian are measured in degrees east (E), and those to the west are measured in degrees west (W). The 180th meridian, on the opposite side of the Earth, is both 180 degrees east and 180 degrees west of the prime meridian. Longitude is used in conjunction with latitude to pinpoint locations on the Earth's surface. It is a crucial component in navigation, cartography, and various scientific disciplines. The concept of longitude was first proposed by the Greek astronomer Eratosthenes in the 3rd century BCE, and it has since been refined and standardized through the development of global positioning systems and other modern technologies.