Google Maps uses multiple coordinate systems, including:

• Latitude and longitude values: These reference a point on the world uniquely and use the World Geodetic System WGS84 standard.
• World coordinates: These reference a point on the map uniquely and are measured from the Mercator projections origin.
• Pixel coordinates: These reference a specific pixel on the map at a specific zoom level.
• Tile coordinates: These reference a specific tile on the map at a specific zoom level.

Whenever the API needs to translate a location in the world to a location on a map, it first translates latitude and longitude values into a world coordinate. The API uses the Mercator projection to perform this translation. Google Maps uses the WGS 84 datum, which stands for World Geodetic System 1984, and is widely used by the Global Positioning System (GPS) and other satellite navigation systems worldwide.