12-09-2003
I assume some program is creating the "detail" file .. how much control over that program do you have? If you could go into it and tell it to stick your header information at the top of the file before it runs through the loop or whatever piece of code creates the 5gb detail file, that might be best...
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LEARN ABOUT DEBIAN
gmtconvert
GMTCONVERT(l) GMTCONVERT(l)
NAME
gmtconvert - Convert between ASCII and binary 1-D tables
SYNOPSIS
gmtconvert [ inputfiles] [ -H[nrec] ] [ -M[flag] ] [ -V ] [ -: ] [ -bi[s]n ] [ -bo[s][n] ]
DESCRIPTION
gmtconvert reads its standard input [or inputfiles] and writes out the information to standard output. Its main purpose is to convert
between binary and ASCII data tables. Input (and hence output) may have multiple subheaders if -M is selected.
datafile(s)
ASCII (or binary, see -bi) file(s) holding a number of data columns.
OPTIONS
-H Input file(s) has Header record(s). Number of header records can be changed by editing your .gmtdefaults file. If used, GMT default
is 1 header record.
-M Multiple segment file(s). Segments are separated by a special record. For ASCII files the first character must be flag [Default is
'>']. For binary files all fields must be NaN.
-V Selects verbose mode, which will send progress reports to stderr [Default runs "silently"].
-: Toggles between (longitude,latitude) and (latitude,longitude) input/output. [Default is (longitude,latitude)]. Applies to geo-
graphic coordinates only.
-bi Selects binary input. Append s for single precision [Default is double]. Append n for the number of columns in the binary file(s).
-bo Selects binary output. Append s for single precision [Default is double].
EXAMPLES
To convert the binary file test.b (single precision) with 4 columns to ASCII, try
gmtconvert test.b -bis4 > test.dat
To convert the multiple segment ASCII table test.d to a double precision binary file, try
gmtconvert test.d -M -bo > test.b
SEE ALSO
gmt(1gmt), minmax(1gmt)
1 Jan 2004 GMTCONVERT(l)