Module axqgs

Classes Ax2QG and Ax3QG implement a WGS84 biaxial respectively EGM2008 triaxial reference ellipsoid and bilinear interpolation of quasi-geoid height N and cartesian X, Y, Z from self-contained, 1-degree, whole Earth grids.

Class Ax5QG --a sub-class of Ax3QG-- is based on 5 bivariate spline interpolations of rectangular grids from SciPy and requires both scipy and numpy to be installed.

Each class provides a forward method to transform geodetic lat-, longitude and ellipsoidal height to cartesian X, Y, Z and orthometric height and a reverse method for converting cartesian to geodetic coordinates and orthometric to ellipsoidal height.