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# klucar/ECEF2LLA.matlab

Last active May 19, 2023 06:06
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LLA2ECEF matlab
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 % LLA2ECEF - convert latitude, longitude, and altitude to % earth-centered, earth-fixed (ECEF) cartesian % % USAGE: % [x,y,z] = lla2ecef(lat,lon,alt) % % x = ECEF X-coordinate (m) % y = ECEF Y-coordinate (m) % z = ECEF Z-coordinate (m) % lat = geodetic latitude (radians) % lon = longitude (radians) % alt = height above WGS84 ellipsoid (m) % % Notes: This function assumes the WGS84 model. % Latitude is customary geodetic (not geocentric). % % Source: "Department of Defense World Geodetic System 1984" % Page 4-4 % National Imagery and Mapping Agency % Last updated June, 2004 % NIMA TR8350.2 % % Michael Kleder, July 2005 function [x,y,z]=lla2ecef(lat,lon,alt) % WGS84 ellipsoid constants: a = 6378137; e = 8.1819190842622e-2; % intermediate calculation % (prime vertical radius of curvature) N = a ./ sqrt(1 - e^2 .* sin(lat).^2); % results: x = (N+alt) .* cos(lat) .* cos(lon); y = (N+alt) .* cos(lat) .* sin(lon); z = ((1-e^2) .* N + alt) .* sin(lat); return

### burak-yildizoz commented Aug 16, 2021

You can also find `ecef2lla` there.