So i'm currently studying calculus on Khanacdemy.Unit on Spherical Trigonometry: Day 1 Lesson Plan Geodetic datums: comparison of different geodetic datums, transformation parameters, transformation equations, Molodensky transformation. Mapping equations, magnification (point scale factor), meridian convergence, (T-t) correction, distance correction. Geodetic mapping of the ellipsoid surface onto a mapping plane: general relationships, important mappings (Mercator, Gaussian, UTM. Direct and reverse problems of geodesy: computation of distance and azimuths of a geodesic, coordinate transfer to a new point. Angle and distance corrections from observed to ellipsoidal values: azimuth and angle corrections, distance corrections. The geodesic curve on the rotational ellipsoid: normal section curve and geodesic, mathematical description of the geodesic.

Differences between natural end ellipsoidal coordinates. Three-dimensional geodesy: 3D ellipsoidal and Cartesian coordinates, coordinates in local geodetic and astronomical frame, coordinate conversion, observation equations in three-dimensional geodesy. Mathematical Geodesy: Reference ellipsoid: ellipsoid parameters, latitudes, curvature radii.

Forward and reverse computations for orthodromic and loxodromic curves on the sphere. Spherical Trigonometry: Elements of spherical trigonometry: sphere, small circles, great circle, spherical twoangle, spherical triangle, fundamental rules in the spherical triangle, equations of Delambre and Napier, Napier’s rule, differential formulas, applications. I'm going to have a course in college called Higher Geodesy

Spherical geometry khan academy