ROTCONVERTER(1) Generic Mapping Tools ROTCONVERTER(1)NAMErotconverter - Manipulate finite and stage rotations
SYNOPSISrotconverter [ +|- ] rotA [ +|- rotB ] [ +|- rotC ] ... [ -C[a|t]] [
-D ] [ -E[fact] ] [ -Fin/out ] [ -N ] [ -S ] [ -T ] [ -V ]
DESCRIPTIONrotconverter reads one or more plate motion models (rotations) stored
in the given files. If more than one plate motion model is given we
will add or subtract them in the order they were listed. The minus
sign means we should first transpose the rotation and then add it to
the previous rotation. The input files must all be of the same type
(stage poles or finite rotations) which may differ from the desired
output format; see -F. If a file cannot be opened we will attempt to
decode the file name as a single rotation whose parameters are sepa‐
rated by slashes.
No space between the option flag and the associated arguments.
Use upper case for the option flags and lower case for modifiers.
rotX Name of a file with a plate motion model. Separate several
files with desired operator (+ or -). The very first file may
also have a leading minus to imply a transpose. If any of the
specified rotation models cannot be opened as a file, we will
try to decode the file name as lon/lat/tstart[/tstop]/angle for
a single rotation given on the command line. The tstop argument
is required for stage poles only. For a single finite rotation
without any time information, give lon/lat/angle only.
OPTIONS-C Write out a column header record identifying the various columns
[Default is no header record]. Append a to indicate opening
angles and t to indicate opening rates [Default].
-D Report longitudes use the -180/+180 range [Default is 0/360].
-E Scale opening angles by fact on output. Requires stage pole
output (see -F).
-F Specify both the input and output format for rotations. The in
and out flags must be either f or s for finite or stage rota‐
tions, respectively. Note that both must be specified if -F is
set [Default is -Fff (both input and output are finite rota‐
tions)].
-N Place all output poles in the northern hemisphere [Default
reports positive rotation angles].
-S Place all output poles in the southern hemisphere [Default
reports positive rotation angles].
-T Transpose the final result, i.e., change the sign of the rota‐
tion angles.
-V Selects verbose mode, which will send progress reports to stderr
[Default runs "silently"]. Report statistics of extracted rota‐
tions.
EXAMPLES
To convert the finite rotations in the file model_finite.APM to stage
poles, run
rotconverter model_finite.APM -Ffs > model_stages.APM
To obtain Nazca motion relative to Pacific hotspots by adding the
motion of Nazca relative to a fixed Pacific to the Pacific-Hotspot ref‐
erence model DC85_stages.d, and report the result as finite reconstruc‐
tion poles in the northern hemisphere, try
rotconverter DC85_stages.APM + Pac_Naz_stages.RPM -N-Fsf >
Naz_HS_finite.APM
To add the final rotations ROT(150.1, 70.5, -20.3) and ROT (145.0,
40.0, 11.4), try
rotconverter 150.1/70.5/-20.3 + 145/40/11.4
which prints out 157.32, -80.44, 11.97.
To make stage rotations suitable for generating flowlines (fracture
zones) from a model of relative plate motions PL1-PL2.RPM, assuming
symmetric spreading,, try
rotconverter PL1-PL2.RPM -E -Ffs > PL1-PL2_half.RPM
rotconverter - PL1-PL2.RPM -E -Ffs > PL2-PL1_half.RPM
SEE ALSObacktracker(1), grdrotater(1), grdspotter(1), hotspotter(1), origina‐
tor(1)GMT 4.5.14 1 Nov 2015 ROTCONVERTER(1)
