projection map
project 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
The surface area of planet Earth is 196.9 million square miles or 5,489,256,960,000,000 square feet.
For maps, it's usually a projection.
a map
mercator
Is called projection .
mercator
mercator
mercator
mercator
mercator
Its called a projection map
Its called a projection map
It is known as cartography.
GPS
Cartography or Geodesy .