2022/07/31 by Charles F. F. Karney, Karney, Charles F. F. · 1 citation
Earth and Planetary Sciences · Mathematics · Social Sciences · #Computational Physics (physics.comp-ph) #Differential Geometry (math.DG) #FOS: Mathematics #FOS: Physical sciences #Geophysics (physics.geo-ph) #Geophysics and Gravity Measurements #Historical Geography and Cartography #Statistical and numerical algorithms
paper · pdf · doi:10.48550/arxiv.2208.00492
openalex publication_date 2022/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The algorithms given in Karney, J. Geodesy 87, 43-55 (2013), to compute geodesics on terrestrial ellipsoids are extended to apply to ellipsoids of revolution with arbitrary eccentricity. For the direct and inverse geodesic problems, this entails implementing the formulation in terms of elliptic integrals given by Legendre and Cayley. The integral for the area of geodesic polygons is computed in terms of the discrete sine transform of the integrand. In all cases, accuracy close to full machine precision is achieved. An open-source implementation of these algorithms is available.