xenial (1) grdpaste.1gmt.gz

Provided by: gmt-common_5.2.1+dfsg-3build1_all bug

NAME

       grdpaste - Join two grids along their common edge

SYNOPSIS

       grdpaste file_a.nc file_b.nc outfile.nc [ [level] ] [ -f<flags> ]

       Note: No space is allowed between the option flag and the associated arguments.

DESCRIPTION

       grdpaste will combine file_a.nc and file_b.nc into outfile.nc by pasting them together along their common
       edge. Files file_a.nc and file_b.nc must have the same dx, dy and have one edge in common. If  in  doubt,
       check  with  grdinfo  and  use  grdcut and/or grdsample if necessary to prepare the edge joint. Note: For
       geographical grids, you may have to use -f to handle periodic  longitudes  unless  the  input  grids  are
       properly recognized as such via their meta-data.

REQUIRED ARGUMENTS

       file_a.nc
              One of two files to be pasted together.

       file_b.nc
              The other of two files to be pasted together.

       -Goutfile.nc
              The name for the combined output.

OPTIONAL ARGUMENTS

       -V[level] (more ...)
              Select verbosity level [c].

       -f[i|o]colinfo (more ...)
              Specify data types of input and/or output columns.

       -^ or just -
              Print a short message about the syntax of the command, then exits (NOTE: on Windows use just -).

       -+ or just +
              Print  an  extensive usage (help) message, including the explanation of any module-specific option
              (but not the GMT common options), then exits.

       -? or no arguments
              Print a complete usage (help) message, including the explanation of options, then exits.

       --version
              Print GMT version and exit.

       --show-datadir
              Print full path to GMT share directory and exit.

GRID FILE FORMATS

       By default GMT writes out grid as single precision floats  in  a  COARDS-complaint  netCDF  file  format.
       However,  GMT  is  able  to  produce  grid  files  in many other commonly used grid file formats and also
       facilitates so called "packing" of grids, writing out floating point data as 1- or  2-byte  integers.  To
       specify  the  precision, scale and offset, the user should add the suffix =id[/scale/offset[/nan]], where
       id is a two-letter identifier of the grid type and precision, and scale and  offset  are  optional  scale
       factor  and  offset to be applied to all grid values, and nan is the value used to indicate missing data.
       In case the two characters id is not provided, as in =/scale than  a  id=nf  is  assumed.   When  reading
       grids,  the  format  is generally automatically recognized. If not, the same suffix can be added to input
       grid file names. See grdconvert and Section grid-file-format of the GMT Technical Reference and  Cookbook
       for more information.

       When  reading  a  netCDF  file  that  contains  multiple  grids,  GMT  will  read,  by default, the first
       2-dimensional grid that can find in that  file.  To  coax  GMT  into  reading  another  multi-dimensional
       variable  in  the grid file, append ?varname to the file name, where varname is the name of the variable.
       Note that you may need to escape the special meaning of ? in your shell program by putting a backslash in
       front  of  it, or by placing the filename and suffix between quotes or double quotes. The ?varname suffix
       can also be used for output grids to specify a  variable  name  different  from  the  default:  "z".  See
       grdconvert and Sections modifiers-for-CF and grid-file-format of the GMT Technical Reference and Cookbook
       for more information, particularly on how to read splices of 3-, 4-, or 5-dimensional grids.

EXAMPLES

       Suppose file_a.nc is 150E - 180E and 0 - 30N, and file_b.nc is 150E - 180E, -30S - 0, then you  can  make
       outfile.nc which will be 150 - 180 and -30S - 30N by:

              gmt grdpaste file_a.nc file_b.nc -Goutfile.nc -V -fg

SEE ALSO

       gmt, grdblend, grdclip, grdcut, grdinfo, grdsample

       2015, P. Wessel, W. H. F. Smith, R. Scharroo, J. Luis, and F. Wobbe