An x-y coordinate system, with the origin at 0° latitude and 0° longitude
The global grid helps me see where the prime merdian is
No
The definition of global grid is a grid that covers the whole Earth.
Locations
the sentence you just typed
The global grid refers to the system of latitude and longitude lines that divides the Earth into a coordinate system for navigation and mapping purposes. The Ordnance Survey grid, specific to Great Britain, is a national grid reference system that uses a more localized, rectangular grid format to provide precise location information. While the global grid offers a universal framework for geographic referencing, the Ordnance Survey grid serves a more practical function for detailed mapping and land use within the UK, often overlaying the global coordinates for enhanced accuracy in local contexts.
The Equator and Prime Meridian
A global grid uses a system of lines of latitude and longitude which allows you to locate any place on Earth with a simple number code and a map grid uses a a system of imaginary to divide up space on a map and you could locate a place that is either in or local to what place the map is representing.
They both allow you to locate a place on either a world map or a globe.
66.5622 degrees north latitude
finding locations by using latitude and longitude
area distance shape direction scale