CONICPROJ(1) GeographicLib Utilities CONICPROJ(1)NAMEConicProj-- perform conic projections
SYNOPSISConicProj ( -c | -a ) lat1 lat2 [ -l lon0 ] [ -k k1 ] [ -r ] [ -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
Perform one of two conic projections geodesics. Convert geodetic
coordinates to either Lambert conformal conic or Albers equal area
coordinates. The standard latitudes lat1 and lat2 are specified by
that the -c option (for Lambert conformal conic) or the -a option (for
Albers equal area). At least one of these options must be given (the
last one given is used). Specify lat1 = lat2, to obtain the case with
a single standard parallel. The central meridian is given by lon0.
The longitude of origin is given by the latitude of minimum (azimuthal)
scale for Lambert conformal conic (Albers equal area). The (azimuthal)
scale on the standard parallels is k1.
Geodetic coordinates are provided on standard input as a set of lines
containing (blank separated) latitude and longitude (decimal degrees or
degrees, minutes, seconds); 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
projected easting, x, and northing, y, (meters) are printed on standard
output together with the meridian convergence gamma (degrees) and
(azimuthal) scale k. For Albers equal area, the radial scale is 1/k.
The meridian convergence is the bearing of the y axis measured
clockwise from true north.
Special cases of the Lambert conformal projection are the Mercator
projection (the standard latitudes equal and opposite) and the polar
stereographic projection (both standard latitudes correspond to the
same pole). Special cases of the Albers equal area projection are the
cylindrical equal area projection (the standard latitudes equal and
opposite), the Lambert azimuthal equal area projection (both standard
latitude corresponds to the same pole), and the Lambert equal area
conic projection (one standard parallel is at a pole).
OPTIONS-c use the Lambert conformal conic projection with standard parallels
lat1 and lat2.
-a use the Albers equal area projection with standard parallels lat1
and lat2.
-l specify the longitude of origin lon0 (degrees, default 0).
-k specify the (azimuthal) scale k1 on the standard parallels (default
1).
-r perform the reverse projection. x and y are given on standard
input and each line of standard output gives latitude, longitude,
gamma, and k.
-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 lengths (in meters). For
latitudes and longitudes (in degrees), the number of digits after
the decimal point is prec + 5. For the convergence (in degrees)
and scale, the number of digits after the decimal point is prec +
6.
--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 39.95N 75.17W | ConicProj-c 40d58 39d56 -l 77d45W
=> 220445 -52372 1.67 1.0
echo 220445 -52372 | ConicProj-c 40d58 39d56 -l 77d45W -r
=> 39.95 -75.17 1.67 1.0
ERRORS
An illegal line of input will print an error message to standard output
beginning with "ERROR:" and causes ConicProj to return an exit code of
1. However, an error does not cause ConicProj to terminate; following
lines will be converted.
AUTHORConicProj was written by Charles Karney.
HISTORYConicProj was added to GeographicLib, <http://geographiclib.sf.net>, in
version 1.9.
GeographicLib 1.45 2015-09-30 CONICPROJ(1)
