CARTCONVERT(1) GeographicLib Utilities CARTCONVERT(1)NAMECartConvert-- convert geodetic coordinates to geocentric or local
cartesian
SYNOPSISCartConvert [ -r ] [ -l lat0 lon0 h0 ] [ -e a f ] [ -w ] [ -p prec ] [
--comment-delimiter commentdelim ] [ --version | -h | --help ] [
--input-file infile | --input-string instring ] [ --line-separator
linesep ] [ --output-file outfile ]
DESCRIPTION
Convert geodetic coordinates to either geocentric or local cartesian
coordinates. Geocentric coordinates have the origin at the center of
the earth, with the z axis going thru the north pole, and the x axis
thru latitude = 0, longitude = 0. By default, the conversion is to
geocentric coordinates. Specifying -l lat0 lon0 h0 causes a local
coordinate system to be used with the origin at latitude = lat0,
longitude = lon0, height = h0, z normal to the ellipsoid and y due
north.
Geodetic coordinates are provided on standard input as a set of lines
containing (blank separated) latitude, longitude (decimal degrees or
degrees, minutes and seconds), and height above the ellipsoid (meters);
for details on the allowed formats for latitude and longitude, see the
"GEOGRAPHIC COORDINATES" section of GeoConvert(1). For each set of
geodetic coordinates, the corresponding cartesian coordinates x, y, z
(meters) are printed on standard output.
OPTIONS-r perform the reverse projection. x, y, z are given on standard
input and each line of standard output gives latitude, longitude,
height.
-l specifies conversions to and from a local cartesion coordinate
systems with origin lat0 lon0 h0, instead of a geocentric
coordinate system. The -w flag can be used to swap the default
order of the 2 geographic coordinates, provided that it appears
before -l.
-e specify the ellipsoid via a f; the equatorial radius is a and the
flattening is f. Setting f = 0 results in a sphere. Specify f < 0
for a prolate ellipsoid. A simple fraction, e.g., 1/297, is
allowed for f. By default, the WGS84 ellipsoid is used, a =
6378137 m, f = 1/298.257223563.
-w on input and output, longitude precedes latitude (except that, on
input, this can be overridden by a hemisphere designator, N, S, E,
W).
-p set the output precision to prec (default 6). prec is the number
of digits after the decimal point for geocentric and local
cartesion coordinates and for the height (in meters). For
latitudes and longitudes (in degrees), the number of digits after
the decimal point is prec + 5.
--comment-delimiter
set the comment delimiter to commentdelim (e.g., "#" or "//"). If
set, the input lines will be scanned for this delimiter and, if
found, the delimiter and the rest of the line will be removed prior
to processing and subsequently appended to the output line
(separated by a space).
--version
print version and exit.
-h print usage and exit.
--help
print full documentation and exit.
--input-file
read input from the file infile instead of from standard input; a
file name of "-" stands for standard input.
--input-string
read input from the string instring instead of from standard input.
All occurrences of the line separator character (default is a
semicolon) in instring are converted to newlines before the reading
begins.
--line-separator
set the line separator character to linesep. By default this is a
semicolon.
--output-file
write output to the file outfile instead of to standard output; a
file name of "-" stands for standard output.
EXAMPLES
echo 33.3 44.4 6000 | CartConvert
=> 3816209.60 3737108.55 3485109.57
echo 33.3 44.4 6000 | CartConvert-l 33 44 20
=> 37288.97 33374.29 5783.64
echo 30000 30000 0 | CartConvert-r
=> 6.483 45 -6335709.73
ERRORS
An illegal line of input will print an error message to standard output
beginning with "ERROR:" and causes CartConvert to return an exit code
of 1. However, an error does not cause CartConvert to terminate;
following lines will be converted.
SEE ALSO
The algorithm for converting geocentric to geodetic coordinates is
given in Appendix B of C. F. F. Karney, Geodesics on an ellipsoid of
revolution, Feb. 2011; preprint <http://arxiv.org/abs/1102.1215>.
AUTHORCartConvert was written by Charles Karney.
HISTORYCartConvert was added to GeographicLib, <http://geographiclib.sf.net>,
in 2009-02. Prior to 2009-03 it was called ECEFConvert.
GeographicLib 1.45 2015-09-30 CARTCONVERT(1)
