NAME

       grdinfo - Get information about the contents of a 2-D grd file

SYNOPSIS

       grdinfo grdfiles [ -C ] [ -D ] [ -F ] [ -L1 ] [ -L2 ] [ -M ] [ -V ]

DESCRIPTION

       grdinfo reads a 2-D binary grd file and reports various statistics for the (x,y,z) data in
       the grdfile. The output information contains the minimum/maximum values for x, y,  and  z,
       where  the  min/max  of z occur, the x- and y-increments, and the number of x and y nodes,
       and [optionally] the mean, standard deviation, and/or the  median,  L1  scale  of  z,  and
       number of nodes set to NaN.

       grdfile
              The name of one or several 2-D grd files.

OPTIONS

       No space between the option flag and the associated arguments.

       -C     Formats the report using tab-separated fields on a single line. The output is w e s
              n z0 z1 dx dy nx ny [ x0 y0 x1 y1 ] [ med scale ] [ mean  std  rms]  [n_nan].   The
              data  in brackets are output only if the corresponding options -M, -L1, -L2, and -M
              are used, respectively.

       -D     Report grid domain and x/y-increments using  dd:mm:ss[.fff]  notation  [Default  is
              decimal].  Does not apply to the -C option.

       -F     Report  grid  domain  and x/y-increments world mapping format [Default is generic].
              Does not apply to the -C option.

       -L1    Report median and L1 scale of z (L1 scale =  1.4826  *  Median  Absolute  Deviation
              (MAD)).

       -L2    Report mean and standard deviation of z.

       -M     Find  and  report the location of min/max z-values, and count and report the number
              of nodes set to NaN, if any.

       -V     Selects verbose mode, which will send progress  reports  to  stderr  [Default  runs
              "silently"].

EXAMPLES

       To obtain all the information about the data set in file hawaii_topo.grd, try

       grdinfo -L1 -L2 -M hawaii_topo.grd

SEE ALSO

       gmt(1gmt), grd2cpt(1gmt), grd2xyz(1gmt), grdedit(1gmt)

                                            1 Jan 2004                                 GRDINFO(l)