ecef2ned

Geocentric ECEF to local Cartesian NED

Syntax

  • [xNorth,yEast,zDown] = ecef2ned(X,Y,Z,lat0,lon0,h0,spheroid)
  • [___] = ecef2ned(___,angleUnit)

Description

[xNorth,yEast,zDown] = ecef2ned(X,Y,Z,lat0,lon0,h0,spheroid) returns coordinates in a local north-east-down (NED) Cartesian system corresponding to coordinates X, Y, Z in an Earth-Centered Earth-Fixed (ECEF) spheroid-centric Cartesian system. Any of the first six numeric input arguments can be scalar, even when the others are nonscalar; but all nonscalar numeric arguments must match in size.

[___] = ecef2ned(___,angleUnit) adds angleUnit which specifies the units of inputs lat0, and lon0.

Input Arguments

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X — ECEF x-coordinatesscalar value | vector | matrix | N-D array

x-coordinates of one or more points in the spheroid-centric ECEF system, specified as a scalar value, vector, matrix, or N-D array. Values must be in units that match the LengthUnit property of the spheroid object.

Data Types: single | double

Y — ECEF y-coordinatesscalar value | vector | matrix | N-D array

y-coordinates of one or more points in the spheroid-centric ECEF system, specified as a scalar value, vector, matrix, or N-D array. Values must be in units that match the LengthUnit property of the spheroid object.

Data Types: single | double

Z — ECEF y-coordinatesscalar value | vector | matrix | N-D array

z-coordinates of one or more points in the spheroid-centric ECEF system, returned as a scalar value, vector, matrix, or N-D array. Units are determined by the LengthUnit property of the spheroid object.

lat0 — Geodetic latitude of local originscalar value | vector | matrix | N-D array

Geodetic latitude of local origin (reference) point(s), specified as a scalar value, vector, matrix, or N-D array. In many cases there is one origin (reference) point, and the value of lat0 is scalar, but it need not be. (It may refer to a moving platform, for example). Values must be in units that match the input argument angleUnit, if supplied, and in degrees, otherwise.

Data Types: single | double

lon0 — Longitude of local originscalar value | vector | matrix | N-D array

Longitude of local origin (reference) point(s), specified as a scalar value, vector, matrix, or N-D array. In many cases there is one origin (reference) point, and the value of lon0 is scalar, but it need not be. (It may refer to a moving platform, for example). Values must be in units that match the input argument angleUnit, if supplied, and in degrees, otherwise.

Data Types: single | double

h0 — Ellipsoidal height of local originscalar value | vector | matrix | N-D array

Ellipsoidal height of local origin (reference) point(s), specified as a scalar value, vector, matrix, or N-D array. In many cases there is one origin (reference) point, and the value of h0 is scalar, but it need not be. (It may refer to a moving platform, for example). Units are determined by the LengthUnit property of the spheroid input.

Data Types: single | double

spheroid — Reference spheroidscalar referenceEllipsoid | oblateSpheroid | referenceSphere object

Reference spheroid, specified as a scalar referenceEllipsoid, oblateSpheroid, or referenceSphere object.

angleUnit — Units of angles'degrees' (default) | 'radians'

Units of angles, specified as ‘degrees' (default), or 'radians'.

Data Types: char

Output Arguments

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xNorth — Local NED x-coordinatesscalar value | vector | matrix | N-D array

x-coordinates of one or more points in the local NED system, returned as a scalar value, vector, matrix, or N-D array. Units are determined by the LengthUnit property of the spheroid input.

yEast — Local NED y-coordinatesscalar value | vector | matrix | N-D array

y-coordinates of one or more points in the local NED system, returned as a scalar value, vector, matrix, or N-D array. Units are determined by the LengthUnit property of the spheroid input.

zDown — Local NED z-coordinatesscalar value | vector | matrix | N-D array

z-coordinates of one or more points in the local NED system, returned as a scalar value, vector, matrix, or N-D array. Units are determined by the LengthUnit property of the spheroid input.

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