lengdegrad
Lengdegrad, also known as meridians, are imaginary lines that run from the North Pole to the South Pole on the Earth's surface. They are used to measure longitude, which is the angular distance east or west of the Prime Meridian. The Prime Meridian, which runs through Greenwich, England, is the reference point for measuring longitude. Meridians are perpendicular to the equator and to each other, dividing the Earth into 360 degrees. Each degree of longitude is further divided into 60 minutes, and each minute into 60 seconds. The distance between meridians decreases as they move towards the poles, with the meridians converging at the poles. Meridians are important in navigation, cartography, and timekeeping, as they help determine a location's position on the Earth's surface and its time zone.