1. Radius of curvature in meridian
(1) Average radius of curvature of meridian
Average radius of curvature of meridian: Meridian perimeter 40008.08km /3.14159265/2 = 6367.4837028919km
(2) Calculation formula of meridian radius of curvature at a certain point
2. Radius of curvature of Maoyou circle
(1) Average radius of curvature of Maoyou line: Equatorial circumference 40075.7km/3.14159265/2 = 6378.2457601561km
(2) Calculation formula for the flat radius of curvature of the Maoyou line at a certain point. The
latitude of this point can be calculated by adding the latitude of this point into the formula.
3. The radius of curvature of the earth
The radius of curvature of the earth is 6371km