/usr/bin/proj --help — Chainguard OS Manuals

From proj-util 9.9.0-r0 (os), captured 2026-11-05 by running proj --help (exit 1) · terse output. permalink

Rel. 9.9.0 (1df2be6), September 15th, 2026
<proj>:
invalid option: --
program abnormally terminated

Options (21)

Option	Description	Source
`-b`	Special option for binary coordinate data input and output through standard input and standard output.	man
`-d` n	Added in version 5.2.0: Specify the number of decimals to round to in the output.	man
`-i`	Selects binary input only (see -b).	man
`-I`	Alternate method to specify inverse projection.	man
`-o`	Selects binary output only (see -b).	man
`-t` a	Where a specifies a character employed as the first character to denote a control line to be passed through without processing.	man
`-e` string	Where string is an arbitrary string to be output if an error is detected during data transformations.	man
`-E`	Causes the input coordinates to be copied to the output line prior to printing the converted values.	man
`-lp`	List of all projection id that can be used with the +proj parameter.	man
`-lP`	Expanded description of all projections that can be used with the +proj parameter.	man
`-le`	List of all ellipsoids that can be selected with the +ellps parameters.	man
`-lu`	List of all distance units that can be selected with the +units parameter.	man
`-r`	This options reverses the order of the expected input from longitude-latitude or x-y to latitude-longitude or y-x.	man
`-s`	This options reverses the order of the output from x-y or longitude-latitude to y-x or latitude-longitude.	man
`-S`	Causes estimation of meridional and parallel scale factors, area scale factor and angular distortion, and maximum and minimum scale factors to be listed between <> for each input point.	man
`-m` mult	The cartesian data may be scaled by the mult parameter.	man
`-f` format	Where format is a printf format string to control the form of the output values.	man
`-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).	man
`-W` n	Where n is the number of significant fractional digits to employ for seconds output.	man
`-v`	Causes a listing of cartographic control parameters tested for and used by the program to be printed prior to input data.	man
`-V`	This option causes an expanded annotated listing of the characteristics of the projected point.	man

Examples (4) from the manual page, untested

proj +proj=utm +zone=12 -r <<EOF
The following script
460770.43 5011865.86
will perform UTM zone 12 forward projection.
proj EPSG:6421 -V <<EOF
This other example
Conic, Sph&Ell
Will perform the projection of the coordinates in "NAD83(2011) / California zone 4" (EPSG:6421) into its geographic system, "NAD83(2011)", showing the expanded annotated listing.

Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.