It is known as the International Date Line.
latitude or longitude...
Coordinates.
Latitude will always be north and south on a world map. Longitude will always be east and west on a map.
Downfall.
The line on the map is called the ratocoal.
A globe or a map.
latitude and longitude Co-ordinates
I believe you are looking for the words - Longitude and Latitude of the grid system.
A world map would be a map (or chart) that displays all of the continents, complete with longitude and lattiude markings, equators and depending on the type of map, cities, states and countries.
Indicating the position of a celestial object is similar to latitude latitude and longitude. But it is called right ascension and declination.
The lines on a map that run north-south are called meridians of longitude, and the lines that run east-west are called parallels of latitude. These lines help to indicate the location and coordinates of different places on Earth.
A book containing longitude and latitude is called an atlas or a map book. It provides geographic coordinates that help in locating specific places on Earth.