“the process of determining the value
of a function between two points at which it has prescribed values.” -
Basically, interpolation is the common sense concept of "The hill
behind me is low, the mountain in front of me is high… therefore
I must be somewhere in between low and high." However simple this
may seem, when you have 3 or more hills at varying distances, it
can get complicated. That is why we need specific algorithms such
as Microsphere Projection to handle these types of difficultiles.