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reckon
PURPOSE ^
RECKON Computes points at a specified azimuth and range
SYNOPSIS ^
function [latout,lonout] = reckon(varargin)
DESCRIPTION ^
RECKON  Computes points at a specified azimuth and range

  [lat,lon] = RECKON(lat0,lon0,rng,az) computes the latitude and
  longitude positions for selected ranges and azimuths from a
  starting point along a great circle path on a globe.  The range
  is input as degrees of arc length on a sphere.  The input
  azimuth is measured clockwise from due north.

  [lat,lon] = RECKON(lat0,lon0,rng,az,geoid) computes the new point
  assuming that the great circle points lie on the ellipsoid defined by
  the input geoid.  The geoid vector is of the form
  [semimajor axes, eccentricity].

  [lat,lon] = RECKON(lat0,lon0,rng,az,'units') uses the input string 'units'
  to define the angle units of the input and output data.  In this
  form, the input range is measured as an arc length in the units
  specified by 'units'.  If 'units' is omitted, 'degrees' are assumed.

  [lat,lon] = RECKON(lat0,lon0,rng,az,geoid,'units') is a valid calling
  form.  In this case, the input range is in the same units as
  the semimajor axes of the geoid vector.

  [lat,lon] = RECKON('track',...) uses the input string 'track' to define
  either a great circle or rhumb line reckon calculation.  If
  'track' = 'gc', then the new point is computed to along a great
  circle track.  If 'track' = 'rh', then the new point is computed
  along a rhumb line track.  If omitted, 'gc' is assumed.

  See also AZIMUTH, DISTANCE
DOWNLOAD M-File ^
10.9 KByte
CROSS-REFERENCE INFORMATION ^
This function calls:
ANGLEDIM Converts angles from one unit system to another
EPSM Calculate the accuracy of the map computations
GEOD2ISO Comutes the isometric latitude given the geodetic latitude
GEOD2REC Converts from rectifying latitude to geodetic latitude
GEOIDTST Tests for a valid geoid vector
NPI2PI Truncates angles into the -180 deg to 180 deg range
REC2GEOD Converts from rectifying latitude to geodetic latitude
RSPHERE Computes radii for a auxiliary spheres
This function is called by:
EQDAZIM Equidistant Azimuthal Projection
GC2SC Converts a great circle definition to a center and radius
TRACK1 Track lines defined by starting point, azimuth and range
SUBFUNCTIONS ^
 
 


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