## 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

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