NAME

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


SYNOPSIS

     grdinfo grdfiles [ -C ] [ -D ] [ -F ] [ -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  [option-
     ally]  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  argu-
     ments.

     -C   Formats the report using tab-separated fields on a sin-
          gle 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.

     -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.


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(l), grd2cpt(l), grd2xyz(l), grdedit(l)