geodetic2ecef convert from geodetic to ECEF coordiantes Inputs ------ lat,lon, alt: ellipsoid geodetic coordinates of point(s) (degrees, degrees, meters) spheroid: referenceEllipsoid parameter struct angleUnit: string for angular units. Default 'd': degrees outputs ------- x,y,z: ECEF coordinates of test point(s) (meters)
0001 function [x,y,z] = geodetic2ecef(spheroid, lat, lon, alt, angleUnit) 0002 %geodetic2ecef convert from geodetic to ECEF coordiantes 0003 % 0004 % Inputs 0005 % ------ 0006 % lat,lon, alt: ellipsoid geodetic coordinates of point(s) (degrees, degrees, meters) 0007 % spheroid: referenceEllipsoid parameter struct 0008 % angleUnit: string for angular units. Default 'd': degrees 0009 % 0010 % outputs 0011 % ------- 0012 % x,y,z: ECEF coordinates of test point(s) (meters) 0013 % 0014 0015 if isempty(spheroid), spheroid = wgs84Ellipsoid(); end 0016 0017 if nargin < 5 || isempty(angleUnit) || strcmpi(angleUnit(1),'d') 0018 lat = deg2rad(lat); 0019 lon = deg2rad(lon); 0020 end 0021 0022 0023 %% Radius of curvature of the prime vertical section 0024 N = get_radius_normal(lat, spheroid); 0025 %% Compute cartesian (geocentric) coordinates given (curvilinear) geodetic coordinates. 0026 0027 x = (N + alt) .* cos(lat) .* cos(lon); 0028 y = (N + alt) .* cos(lat) .* sin(lon); 0029 z = (N .* (spheroid.SemiminorAxis / spheroid.SemimajorAxis)^2 + alt) .* sin(lat); 0030 0031 end 0032 0033 % Copyright (c) 2014-2018 Michael Hirsch, Ph.D. 0034 % Copyright (c) 2013, Felipe Geremia Nievinski 0035 % 0036 % Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 0037 % 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 0038 % 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 0039 % THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.