projection map
Within a context, the two may be different, yet the general descriptions are the same. A level surface is measurably level; a horizontal surface simply implies the relative situation for a surface.
Surface area of a sphere = 4*pi*radius2
For maps, it's usually a projection.
a map
A map is a flat drawing that shows all or parts of earth surface.
mercator
mercator
mercator
mercator
mercator
Its called a projection map
Its called a projection map
A system of mapping the round earth on a flat surface is called a map projection. Map projections are used to represent the Earth's curved surface on a two-dimensional map. Different map projections have different strengths and weaknesses depending on the purpose of the map.
GPS
It is known as cartography.
Cartography or Geodesy .
it is a robinson projection