chrisveness/geodesy

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1227 stars · 207 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A JavaScript library of geodesy functions covering distances, bearings, and coordinate conversions on spherical and ellipsoidal earth models. It includes UTM/MGRS and OSGB grid references, historical datum conversions, and modern terrestrial reference frame conversions.

Use cases

• calculate distance between two latitude/longitude points
• compute bearing and destination point from lat/lon
• convert lat/lon to UTM or MGRS coordinates
• convert between datums like NAD83, OSGB36, or ITRF2014
• work with n-vector geodesy representations
• parse and format degrees minutes seconds coordinates
• convert geodetic coordinates to cartesian x/y/z

When to choose

• you need accurate geodesic calculations in JavaScript for browser or Node.js
• you need coordinate conversions between WGS84, UTM, MGRS, or national grids
• you want well-documented, language-agnostic geodesy algorithms you can port
• you need both simple spherical and high-accuracy ellipsoidal earth models

When to avoid

• you need geospatial features beyond coordinate math such as routing, geocoding, or map rendering
• you work in a language other than JavaScript and cannot port the algorithms
• you need a full GIS toolkit with projections beyond the ones covered
• you require high-performance bulk processing of millions of coordinates

Facets

library · maturity stable

geospatial math sdk developer-tools browser cross-platform geodesy latitude-longitude haversine vincenty utm mgrs datum-conversion n-vector wgs84 coordinate-conversion geospatial maps algorithms javascript nodejs

Member repositories

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