NAME

       Crop - crop regions of a dataset

SYNOPSIS

       astcrop [OPTION...] [Crop-Identifier] ASTRdata ...

DESCRIPTION

       Crop  is  part  of  GNU  Astronomy  Utilities 0.19.  Crop will create cutouts, thumbnails,
       postage stamps or crops  of  region(s)  from  input  image(s)  using  image  or  celestial
       coordinates.  If  muliple crops are desired, a catalog must be provided. When in WCS mode,
       if the cut out covers more than one input image, all  overlapping  input  images  will  be
       stitched in the output.

       For  more  information, please run any of the following commands. In particular the second
       contains a  very  comprehensive  explanation  of  Crop's  invocation:  expected  input(s),
       output(s), and a full description of all the options.

       All options and their values:
              $ astcrop -P

       Inputs/Outputs and options:
              $ info astcrop

       Full section in manual/book:
              $ info Crop

       Full Gnuastro manual/book:
              $ info gnuastro

       If  you  couldn't find your answer in the manual, you can get direct help from experienced
       Gnuastro users and developers. For more information, please run:

              $ info help-gnuastro

       Crop options:

              Input:

       --hendwcs=INT
              Header keyword number to stop reading WCS.

       --hstartwcs=INT
              Header keyword number to start reading WCS.

       -h, --hdu=STR/INT
              Extension name or number of (all) input(s).

       -O, --mode=STR
              Coordinate mode 'img' or 'wcs'.

       -z, --zeroisnotblank
              0.0 in float or double images are not blank.

              Output:

       -b, --noblank
              Remove parts of the crop box out of input image.

       -D, --dontdelete
              Don't delete output if it exists.

       -K, --keepinputdir
              Keep input directory for automatic output.

       -o, --output=STR
              Output file name.

       --primaryimghdu
              Write crop in primary/zero-th HDU of output.

       -p, --suffix=STR
              Suffix (postfix) of cropped images.

       --tableformat=STR
              Table fmt: 'fits-ascii', 'fits-binary', 'txt'.

       -t, --oneelemstdout
              Print one element's value on stdout.

       -T, --type=STR
              Type of output: e.g., int16, float32, etc...

       --wcslinearmatrix=STR
              WCS linear matrix of output ('pc' or 'cd').

       -X, --widthinpix           --width is in pixels (even in WCS mode).

              Crop by center

       --checkcenter=FLT/INT
              Width (in pixels) of box at center to check.

       -c, --center=FLT[,...]
              Central coordinates of a single crop.

       -w, --width=FLT[,...]
              Width when crop is defined by its center.

              Crop by center (when a catalog is given)

       --cathdu=STR/INT
              HDU of catalog, if it is a FITS table.

       -C, --catalog=FITS/TXT
              Input catalog filename.

       -I, --ignorecase
              Ignore case in matching/searching columns.

       -n, --namecol=STR/INT
              Column no./info of crop filename (no suffix).

       --searchin=STR
              Select column(s): 'name', 'unit', 'comment'.

       -x, --coordcol=STR/INT
              Column no./info containing coordinates.

              Crop by region

       -l, --polygon=FLT,FLT[:...]
              Polygon vertices, also a DS9 region file.

       --polygonout
              Keep the polygon's outside, mask the inside.

       --polygonsort
              Sort polygon vertices as counter-clockwise.

       -s, --section=STR
              Image section string specifying crop range.

              Operating modes:

       -?, --help
              give this help list

       --checkconfig
              List all config files and variables read.

       --cite BibTeX citation for this program.

       --config=STR
              Read configuration file STR immediately.

       --lastconfig
              Do not parse any more configuration files.

       --log  Information about output(s) in a log file.

       --minmapsize=INT
              Min. bytes to avoid RAM automatically.

       -N, --numthreads=INT
              Number of CPU threads to use.

       --onlyversion=STR
              Only run if the program version is STR.

       -P, --printparams
              Print parameter values to be used and abort.

       --quietmmap
              Don't print mmap'd file's name and size.

       -q, --quiet
              Only report errors, remain quiet about steps.

       -S, --setdirconf
              Set default values for this directory and abort.

       --usage
              give a short usage message

       -U, --setusrconf
              Set default values for this user and abort.

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory  or  optional  for  any
       corresponding short options.

       GNU Astronomy Utilities home page: http://www.gnu.org/software/gnuastro/

REPORTING BUGS

       Report bugs to bug-gnuastro@gnu.org.

COPYRIGHT

       Copyright  ©  2015-2022 Free Software Foundation, Inc.  License GPLv3+: GNU General public
       license version 3 or later.
       This is free software: you are free to change and redistribute it.  There is NO  WARRANTY,
       to the extent permitted by law.

       Written/developed by Mohammad Akhlaghi

SEE ALSO

       The  full  documentation for Crop is maintained as a Texinfo manual.  If the info and Crop
       programs are properly installed at your site, the command

              info Crop

       should give you access to the complete manual.