NAME

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

SYNOPSIS

      grdinfo grdfiles [ -C ] [ -L1 ] [ -L2 ] [ -M ]

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].  The data in brackets are output only if
           the corresponding options -M, -L1, and -L2 are used.

      -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.

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, grd2cpt, grd2xyz, grdedit