Provided by: proj-bin_6.3.1-1_amd64 
NAME
cs2cs - Cartographic coordinate system filter
SYNOPSIS
cs2cs [-eEfIlrstvwW [args]] [+opt[=arg] ...] [+to +opt[=arg] ...] file ...
or
cs2cs [-eEfIlrstvwW [args]] {source_crs} +to {target_crs} file ...
where {source_crs} or {target_crs} is a PROJ string, a WKT string or a AUTHORITY:CODE
(where AUTHORITY is the name of a CRS authority and CODE the code of a CRS found in the
proj.db database), expressing a coordinate reference system.
New in version 6.0.0.
or
cs2cs [-eEfIlrstvwW [args]] {source_crs} {target_crs}
New in version 6.0.0.
DESCRIPTION
cs2cs performs transformation between the source and destination cartographic coordinate
reference system on a set of input points. The coordinate reference system transformation
can include translation between projected and geographic coordinates as well as the
application of datum shifts.
The following control parameters can appear in any order:
-I Method to specify inverse translation, convert from +to coordinate system to the
primary coordinate system defined.
-t<a> Where a specifies a character employed as the first character to denote a control
line to be passed through without processing. This option applicable to ASCII input
only. (# is the default value).
-d <n>
New in version 5.2.0: Specify the number of decimals in the output.
-e <string>
Where string is an arbitrary string to be output if an error is detected during
data transformations. The default value is a three character string: *\t*.
-E Causes the input coordinates to be copied to the output line prior to printing the
converted values.
-l<[=id]>
List projection identifiers that can be selected with +proj. cs2cs -l=id gives
expanded description of projection id, e.g. cs2cs -l=merc.
-lp List of all projection id that can be used with the +proj parameter. Equivalent to
cs2cs -l.
-lP Expanded description of all projections that can be used with the +proj parameter.
-le List of all ellipsoids that can be selected with the +ellps parameters.
-lu List of all distance units that can be selected with the +units parameter.
-ld List of datums that can be selected with the +datum parameter.
-r This options reverses the order of the expected input from longitude-latitude or
x-y to latitude-longitude or y-x.
-s This options reverses the order of the output from x-y or longitude-latitude to y-x
or latitude-longitude.
-f <format>
Where format is a printf format string to control the form of the output values.
For inverse projections, the output will be in degrees when this option is
employed. If a format is specified for inverse projection the output data will be
in decimal degrees. The default format is "%.2f" for forward projection and DMS for
inverse.
-w<n> Where n is the number of significant fractional digits to employ for seconds output
(when the option is not specified, -w3 is assumed).
-W<n> Where n is the number of significant fractional digits to employ for seconds
output. When -W is employed the fields will be constant width with leading zeroes.
-v Causes a listing of cartographic control parameters tested for and used by the
program to be printed prior to input data.
The +opt run-line arguments are associated with cartographic parameters.
The cs2cs program requires two coordinate reference system (CRS) definitions. The first
(or primary is defined based on all projection parameters not appearing after the +to
argument. All projection parameters appearing after the +to argument are considered the
definition of the second CRS. If there is no second CRS defined, a geographic CRS based on
the datum and ellipsoid of the source CRS is assumed. Note that the source and destination
CRS can both of same or different nature (geographic, projected, compound CRS), or one of
each and may have the same or different datums.
When using a WKT definition or a AUTHORITY:CODE, the axis order of the CRS will be
enforced. So for example if using EPSG:4326, the first value expected (or returned) will
be a latitude.
Internally, cs2cs uses the proj_create_crs_to_crs() function to compute the appropriate
coordinate operation, so implementation details of this function directly impact the
results returned by the program.
The environment parameter PROJ_LIB establishes the directory for resource files (database,
datum shift grids, etc.)
One or more files (processed in left to right order) specify the source of data to be
transformed. A - will specify the location of processing standard input. If no files are
specified, the input is assumed to be from stdin. For input data the two data values must
be in the first two white space separated fields and when both input and output are ASCII
all trailing portions of the input line are appended to the output line.
Input geographic data (longitude and latitude) must be in DMS or decimal degrees format
and input cartesian data must be in units consistent with the ellipsoid major axis or
sphere radius units. Output geographic coordinates will normally be in DMS format (use -f
%.12f for decimal degrees with 12 decimal places), while projected (cartesian) coordinates
will be in linear (meter, feet) units.
EXAMPLES
Using PROJ strings
The following script
cs2cs +proj=latlong +datum=NAD83 +to +proj=utm +zone=10 +datum=NAD27 -r <<EOF
45d15'33.1" 111.5W
45d15.551666667N -111d30
+45.25919444444 111d30'000w
EOF
will transform the input NAD83 geographic coordinates into NAD27 coordinates in the UTM
projection with zone 10 selected. The geographic values of this example are equivalent and
meant as examples of various forms of DMS input. The x-y output data will appear as three
lines of:
1402293.44 5076292.68 0.00
Using EPSG codes
Transforming from WGS 84 latitude/longitude (in that order) to UTM Zone 31N/WGS 84
cs2cs EPSG:4326 EPSG:32631 <<EOF
45N 2E
EOF
outputs
421184.70 4983436.77 0.00
SEE ALSO
proj(1), cct(1), geod(1), gie(1), projinfo(1)
BUGS
A list of know bugs can be found at https://github.com/OSGeo/PROJ/issues where new bug
reports can be submitted to.
HOME PAGE
https://proj.org/
AUTHOR
Frank Warmerdam
COPYRIGHT
1983-2020