Here's a breakdown:

* Longitude: Measured in degrees east or west of the Prime Meridian, which runs through Greenwich, England.

* Latitude: Measured in degrees north or south of the Equator, which is an imaginary circle around the Earth at 0 degrees.

Each degree is further divided into 60 minutes (') and each minute into 60 seconds ("). So you can see coordinates like 40° 45' 30" N, 74° 00' 15" W.