XYZ2GRD
Section: Misc. Reference Manual Pages (l)
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NAME
xyz2grd - Converting an ASCII or binary table to grd file format
SYNOPSIS
xyz2grd xyzfile -Ggrdfile -Ix_inc[m|c][/y_inc[m||cc]]
-Rwest/east/south/north [ -Dxunit/yunit/zunit/scale/offset/title/remark ]
[ -F ] [ -H ] [ -L ] [ -Nnodata ] [ -V ] [ -Z ] [ -: ] [ -b[d] ]
DESCRIPTION
xyz2grd reads an ASCII [or binary] table with xyz triplets in the first 3 columns and
creates a binary grdfile. xyz2grd will report if some of the nodes are not filled in with
data. Such unconstrained nodes are set to a value specified by the user [Default is NaN]. As an option,
a 1-column z-table may be read assuming the ordering follows the scanline orientation and that all nodes
are present.
- xyzfile
-
ASCII [or binary, see -b] file holding (x,y,z) values in the first three columns for all the nodes. The triplets do not
have to be sorted (unless -Z is used).
- -G
-
grdfile is the name of the binary output grdfile.
- -I
-
x_inc [and optionally y_inc] is the gridding interval. Append m to indicate minutes, or c to indicate seconds.
#include "explain_-R.txt"
OPTIONS
- -D
-
Give values for xunit, yunit, zunit, scale, offset, title, and remark.
To leave some of these values untouched, specify = as the value.
- -F
-
Force pixel registration [Default is grid registration].
#include "explain_-H.txt"
Not used with binary data.
- -L
-
Indicates that the x column contains longitudes, which may differ from the regions in -R by [multiples of] 360 degrees [Default assumes no periodicity].
- -N
-
No data. Set nodes with no data to this value [Default is NaN].
#include "explain_-V.txt"
- -Z
-
Only read a 1-column ASCII [or binary] table. This assumes that all the nodes are
present and sorted according to the scanline ordering convention.
#include "explain_-t.txt"
- -b
-
Selects binary input mode (double precision) [Default is ASCII].
Append d to indicate double precision [Default is single].
EXAMPLES
To create a grdfile from the ASCII data in hawaii_grv.xyz, try
xyz2grd hawaii_grv.xyz -Ddegree/degree/mGal/1/0/"Hawaiian Gravity"/"GRS-80 Ellipsoid used"
-Ghawaii_grv_new.grd -R198/208/18/25 -I5m -V
To create a grdfile from the raw binary (single-precision) scanline-oriented data raw.b, try
xyz2grd raw.b -Dm/m/m/1/0/=/= -Graw.grd -R0/100/0/100 -I1 -V -Z -b
SEE ALSO
gmt, grd2xyz, grdedit
#include "refs.i"
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- EXAMPLES
-
- SEE ALSO
-
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