How to Read Longitude and Latitude?

Longitude and latitude are ways of measuring and stating map positions. Longitude is measured from the Prime Meridian or PM (an imaginary line which runs from north to south pole through Greenwich, England) in degrees. East of PM is stated in positive numbers up to 180 degrees while west of PM is stated in negative numbers up to -180 degrees. Latitude measured from the equator in positive degrees to the north and negative degrees to the south.You can find more information here: