Ubuntu Manpage: grdpaste - Join two grids along their common edge

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

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

COPYRIGHT

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

5.2.1                                           January 28, 2016                                  GRDPASTE(1gmt)