Geographical coordinates are a system used to specify locations on the Earth’s surface. Our systems use Google Maps API to accurately determin this vairable, the user can simple search via their postcode, city or even place name. 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 star map 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.
It is also possible to manually select the coordinates numbers – this will effect the stars position in real time.
It is also possible for the user to change the location text only to something more personal such as “Lydia’s Tree House” however the numbers denoting this location will not change. Unless the otherwise specified on a separate data field, all accessible on the product page.
The geographic location on earth is one major vector for the calculation of your star map.