Calculators » LLA to ECEF Converter Calculator & Formula

LLA to ECEF Converter Calculator & Formula

gps coordinate conversion lla ecef gps calculator formula

Geodetic coordinates viz. Latitude, Longitude, Altitude (LLA) are most intuitive for users, but internal GNSS solutions work in ECEF Cartesian coordinates. Converting between these systems is a cornerstone of GPS and geospatial engineering.

GPS LLA to ECEF Converter Calculator

Inputs

Outputs

INPUTS:

  • Latitude (ϕ) = 40 degrees
  • Longitude (λ) = -75 degrees
  • Altitude (h) = 100 meters

OUTPUTS:

  • Radius of Curvature (N) = 6386976.16 meters
  • X = 1266345.73 meters
  • Y = -4726066.62 meters
  • Z = 4078049.85 meters

Constants:

  • Semi-major axis (a) = 6,378,137
  • Eccentricity squared (e^2) = 0.00669438

GPS LLA to ECEF Converter Formula

LLA to ECEF Coordinate Conversion

Benefits/Applications

  • Transforms human friendly location into machine friendly ECEF format.
  • Enables 3D geometric calculations and satellite distance computations.
  • Used in UAV navigation, GIS conversions and coordinate transformation workflows.

Summary: This calculator bridges human and machine coordinate systems, enabling any GNSS data processing pipeline to compute precise geometric positions.