Provided by: geographiclib-tools_1.8-2_amd64
GeoConvert -- convert geographic coordinates
GeoConvert [ -g | -d | -u | -m | -c ] [ -p prec ] [ -z zone | -s | -t ] [ -n ] [ --version | -h | --help ]
GeoConvert reads from standard input interpreting each line as a geographic coordinate and prints the coordinate in the format specified by the options on standard output. The input is interpreted in one of three different ways depending on how many space or comma delimited tokens there are on the line. The options -g, -d, -u, and -m govern the format of output. In all cases, the WGS84 model of the earth is used (a = 6378137m, f = 1/298.257223563). geographic 2 tokens (output options -g or -d) given as latitude longitude using decimal degrees or degrees minutes seconds. d, ', and " are used to denote degrees, minutes, and seconds, with the least significant designator optional. Latitude is given first; however, on input, either may be given first by appending or prepending N or S to the latitude and E or W to the longitude. For example, the following are all equivalent 33.3 44.4 E44.4 N33.3 33d18'N 44d24'E 44d24 33d18N UTM/UPS 3 tokens (output option -u) given as zone+hemisphere easting northing or easting northing zone+hemisphere, where hemisphere is either N or S. The zone is absent for a UPS specification. For example, 38N 444140.54 3684706.36 444140.54 3684706.36 38N S 2173854.98 2985980.58 2173854.98 2985980.58 S MRGS 1 token (output option -m) is used to specify the center of an MGRS grid square. For example, 38SMB4484 38SMB44140847064
-g output latitude and longitude using decimal degrees. Default output mode. -d output latitude and longitude using degrees, minutes, and seconds (DMS). -u output UTM or UPS. -m output MGRS. -c output meridian convergence and scale for the corresponding UTM or UPS projection. Convergence is the bearing of grid north given as degrees clockwise from true north. -p set the precision to prec (default 0); prec is the precision relative to 1m. See PRECISION. -z set the zone to zone for output. Use either 0 < zone <= 60 for a UTM zone or zone = 0 for UPS. Alternatively use a zone+hemisphere designation (hemisphere is ignored), e.g., 38N. See ZONE. -s use the standard UPS and UTM zones. -t similar to -s but forces UPS regions to the closest UTM zone. -n on input, MGRS coordinates refer to the south-west corner of the MGRS square instead of the center; see MGRS. --version print version. -h print usage. --help print full documentation.
prec gives precision of the output with prec = 0 giving 1m precision, prec = 3 giving 1mm precision, etc. prec is the number of digits after the decimal point for UTM/UPS. The number of digits per coordinate for MGRS is 5 + prec. For decimal degrees, the number of digits after the decimal point is 5 + prec. For DMS (degree, minute, seconds) output, the number of digits after the decimal point in the seconds components is 1 + prec; if this is negative then use minutes (prec = -2 or -3) or degrees (prec <= -4) as the least significant component. Print convergence, resp. scale, with 5 + prec, resp. 7 + prec, digits after the decimal point. The minimum value of prec is -5 and the maximum is 9 for UTM/UPS, 9 for decimal degrees, 10 for DMS, 6 for MGRS, and 8 for convergence and scale.
MGRS coordinates represent a square patch of the earth, thus "38SMB4488" is in zone "38N" with 444km <= easting < 445km and 3688km <= northing < 3689km. Consistent with this representation, coordinates are truncated (instead of rounded) to the requested precision. Similiarly, on input an MGRS coordinate represents the center of the square ("38N 444500 3688500" in the example above). However, if the -n option is given then the south-west corner of the square is returned instead ("38N 444000 3688000" in the example above).
If the input is geographic, GeoConvert uses the standard rules of selecting UTM vs UPS and for assigning the UTM zone (with the Norway and Svalbard exceptions). If the input is UTM/UPS, or MGRS, then the choice beteen UTM and UPS and the UTM zone mirrors the input. The -z zone, -s, -t options allow these rules to be overridden with zone = 0 being used to indicate UPS. For example, the point 79.9S 6.1E corresponds to possible MGRS coordinates 32CMS4324728161 (standard UTM zone = 32) 31CEM6066227959 (neighboring UTM zone = 31) BBZ1945517770 (neighboring UPS zone) then echo 79.9S 6.1E | GeoConvert -p -3 -m => 32CMS4328 echo 31CEM6066227959 | GeoConvert -p -3 -m => 31CEM6027 echo 31CEM6066227959 | GeoConvert -p -3 -m -s => 32CMS4328 echo 31CEM6066227959 | GeoConvert -p -3 -m -z 0 => BBZ1917 NOTE: the letter in the zone specification for UTM is a hemisphere designator N or S and not an MGRS latitude band letter. Convert the MGRS latitude band letter to a hemisphere as follows: replace C thru M by S; replace N thru X by N.
echo 38SMB4488 | GeoConvert => 33.33424 44.40363 echo 38SMB4488 | GeoConvert -d -p 1 => 33d20'03.25"N 044d24'13.06"E echo 38SMB4488 | GeoConvert -u => 38N 444500 3688500 echo E44d24 N33d20 | GeoConvert -m -p -3 => 38SMB4488
An illegal line of input will print an error message to standard output beginning with "ERROR:" and causes GeoConvert to return an exit code of 1. However, an error does not cause GeoConvert to terminate; following lines will be converted.
UTM Universal Transverse Mercator, <http://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system>. UPS Univeral Polar Stereographic, <http://en.wikipedia.org/wiki/Universal_Polar_Stereographic>. MGRS Military Grid Reference System, <http://en.wikipedia.org/wiki/Military_grid_reference_system>. WGS84 World Geodetic System 1984, <http://en.wikipedia.org/wiki/WGS84>.
GeoConvert is a part of GeographicLib, <http://geographiclib.sf.net>. The algorithms for the transverse Mercator projection are described in C. F. F. Karney, Transverse Mercator with an accuracy of a few nanometers, J. Geod (2011); DOI <http://dx.doi.org/10.1007/s00190-011-0445-3>; preprint <http://arxiv.org/abs/1002.1417>.
GeoConvert was written by Charles Karney.