Geographical coordinates are a system used to specify locations on the Earth’s surface. Our systems use Google Maps API to accurately determine this vairable, the user can simple search via their postcode, city or even place name.
We use the same proces to determine the earth location for our star maps Geographical coordinates are based on the Earth’s reference ellipsoid, a model that approximates the Earth’s shape as an oblate spheroid (a sphere flattened at the poles).
The coordinates are illustrated on the Moon Phase Print using the following denominations:
Latitude – is the angular distance north or south of the Earth’s equator. It is measured in degrees and ranges from 0° at the equator to 90° at the North and South Poles. The equator itself is defined as 0° latitude. Positive latitudes are used for locations in the Northern Hemisphere, while negative latitudes are used for locations in the Southern Hemisphere.
Longitude – is the angular distance east or west of a reference meridian, typically the Prime Meridian, which passes through Greenwich, London, UK. It is also measured in degrees and ranges from 0° to 180° east or west. The Prime Meridian is defined as 0° longitude, with positive longitudes to the east and negative longitudes to the west.
The geographic location on earth is one major vector for the calculation of your Moon Phase Print.