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)