FORTRAN SOFTWARE CATALOG

Repository owner: Jacob Williams (jacobwilliams)

geodesic-fortran

Distances, bearings and geodetic coordinate transformations on spheres and ellipsoids.

Repository · Pinned source (b16eaf6622ba) · Try in playground · Checked package example

GAMS classifications

About this package

Category
Geodesy
License
BSD-3

Topics: coordinate-transformations, distances, ellipsoids, fortran, fortran-package-manager, geodesics, geodesy, geodetic-computations, vincenty-direct, vincenty-formula, vincenty-inverse

Package dependencies

Resolved GitHub repositories used by the verified playground build, combining direct and indirect dependencies. This list does not describe internal module dependencies or native system libraries.

Required by this build

No additional GitHub package dependencies were recorded for this verified build.

Build record verified 2026-10-27.

Used by (0 selected packages)

No other selected build records this repository as a dependency. This is not a measure of usage outside the catalog.

Reviewed procedures

These mappings have pinned source evidence. A checked package example may exercise only some of them; source review is not a numerical benchmark.

inverse, direct

Module: geodesic_module

P

P: verified

Derivatives / callbacks: not applicable

Checked direct and inverse geodesics on a sphere and WGS84 equatorial/meridional paths, using independent haversine distances/bearings, exact equatorial arcs and refined meridional curvature quadrature. Direct inputs are independent references, not inverse outputs. General ellipsoidal paths and antipodal degeneracies remain unverified; P has no finer published children.

Pinned source: src/geodesic_module.F90

Author examples/tests: test/direct_inverse_test.f90

Load checked GAMS driver: gams-geodesic-reference