1CARTCONVERT(1)              GeographicLib Utilities             CARTCONVERT(1)
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NAME

6       CartConvert -- convert geodetic coordinates to geocentric or local
7       cartesian
8

SYNOPSIS

10       CartConvert [ -r ] [ -l lat0 lon0 h0 ] [ -e a f ] [ -w ] [ -p prec ] [
11       --comment-delimiter commentdelim ] [ --version | -h | --help ] [
12       --input-file infile | --input-string instring ] [ --line-separator
13       linesep ] [ --output-file outfile ]
14

DESCRIPTION

16       Convert geodetic coordinates to either geocentric or local cartesian
17       coordinates.  Geocentric coordinates have the origin at the center of
18       the earth, with the z axis going thru the north pole, and the x axis
19       thru latitude = 0, longitude = 0.  By default, the conversion is to
20       geocentric coordinates.  Specifying -l lat0 lon0 h0 causes a local
21       coordinate system to be used with the origin at latitude = lat0,
22       longitude = lon0, height = h0, z normal to the ellipsoid and y due
23       north.
24
25       Geodetic coordinates are provided on standard input as a set of lines
26       containing (blank separated) latitude, longitude (decimal degrees or
27       degrees, minutes and seconds), and height above the ellipsoid (meters);
28       for details on the allowed formats for latitude and longitude, see the
29       "GEOGRAPHIC COORDINATES" section of GeoConvert(1).  For each set of
30       geodetic coordinates, the corresponding cartesian coordinates x, y, z
31       (meters) are printed on standard output.
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OPTIONS

34       -r  perform the reverse projection.  x, y, z are given on standard
35           input and each line of standard output gives latitude, longitude,
36           height.
37
38       -l lat0 lon0 h0
39           specifies conversions to and from a local cartesion coordinate
40           systems with origin lat0 lon0 h0, instead of a geocentric
41           coordinate system.  The -w flag can be used to swap the default
42           order of the 2 geographic coordinates, provided that it appears
43           before -l.
44
45       -e a f
46           specify the ellipsoid via the equatorial radius, a and the
47           flattening, f.  Setting f = 0 results in a sphere.  Specify f < 0
48           for a prolate ellipsoid.  A simple fraction, e.g., 1/297, is
49           allowed for f.  By default, the WGS84 ellipsoid is used, a =
50           6378137 m, f = 1/298.257223563.
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52       -w  toggle the longitude first flag (it starts off); if the flag is on,
53           then on input and output, longitude precedes latitude (except that,
54           on input, this can be overridden by a hemisphere designator, N, S,
55           E, W).
56
57       -p prec
58           set the output precision to prec (default 6).  prec is the number
59           of digits after the decimal point for geocentric and local
60           cartesion coordinates and for the height (in meters).  For
61           latitudes and longitudes (in degrees), the number of digits after
62           the decimal point is prec + 5.
63
64       --comment-delimiter commentdelim
65           set the comment delimiter to commentdelim (e.g., "#" or "//").  If
66           set, the input lines will be scanned for this delimiter and, if
67           found, the delimiter and the rest of the line will be removed prior
68           to processing and subsequently appended to the output line
69           (separated by a space).
70
71       --version
72           print version and exit.
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74       -h  print usage and exit.
75
76       --help
77           print full documentation and exit.
78
79       --input-file infile
80           read input from the file infile instead of from standard input; a
81           file name of "-" stands for standard input.
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83       --input-string instring
84           read input from the string instring instead of from standard input.
85           All occurrences of the line separator character (default is a
86           semicolon) in instring are converted to newlines before the reading
87           begins.
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89       --line-separator linesep
90           set the line separator character to linesep.  By default this is a
91           semicolon.
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93       --output-file outfile
94           write output to the file outfile instead of to standard output; a
95           file name of "-" stands for standard output.
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EXAMPLES

98          echo 33.3 44.4 6000 | CartConvert
99          => 3816209.60 3737108.55 3485109.57
100          echo 33.3 44.4 6000 | CartConvert -l 33 44 20
101          => 37288.97 33374.29 5783.64
102          echo 30000 30000 0 | CartConvert -r
103          => 6.483 45 -6335709.73
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ERRORS

106       An illegal line of input will print an error message to standard output
107       beginning with "ERROR:" and causes CartConvert to return an exit code
108       of 1.  However, an error does not cause CartConvert to terminate;
109       following lines will be converted.
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SEE ALSO

112       The algorithm for converting geocentric to geodetic coordinates is
113       given in Appendix B of C. F. F. Karney, Geodesics on an ellipsoid of
114       revolution, Feb. 2011; preprint <https://arxiv.org/abs/1102.1215>.
115

AUTHOR

117       CartConvert was written by Charles Karney.
118

HISTORY

120       CartConvert was added to GeographicLib,
121       <https://geographiclib.sourceforge.io>, in 2009-02.  Prior to 2009-03
122       it was called ECEFConvert.
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126GeographicLib 1.49                2017-10-05                    CARTCONVERT(1)
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