Geometry

XpointA = 1
YpointA = 1
XpointB = 2
YpointB = 2
distance = ( ( XpointA - XpointB ) ** 2 ) + ( ( YpointA - YpointB ) ** 2 ) ** 0.5
KMonearth = distance * 100 # Very rough estimate for when using longtitude and latitude (in the Netherlands)