.. index:: ! velo

******
velo
******

.. only:: not man

    Plot velocity vectors, crosses, and wedges on maps

Synopsis
--------

.. include:: ../../common_SYN_OPTs.rst_

**gmt velo** [ *table* ] |-J|\ *parameters*
|SYN_OPT-R|
[ |-A|\ *parameters* ]
[ |SYN_OPT-B| ]
[ |-E|\ *color* ]
[ |-F|\ *color* ]
[ |-G|\ *color* ]
[ |-L| ]
[ |-N| ]
[ |-S|\ *symbol*/*scale*\ [/*args* ] ]
[ |SYN_OPT-U| ]
[ |SYN_OPT-V| ]
[ |-W|\ *pen* ]
[ |SYN_OPT-X| ]
[ |SYN_OPT-Y| ]
[ |SYN_OPT-di| ]
[ |SYN_OPT-e| ]
[ |SYN_OPT-h| ]
[ |SYN_OPT-i| ]
[ |SYN_OPT-t| ]
[ |SYN_OPT-:| ]
[ |SYN_OPT--| ]

.. include:: velo_common.rst_

Examples
--------

The following should make big red arrows with green ellipses, outlined
in red. Note that the 39% confidence scaling will give an ellipse which
fits inside a rectangle of dimension Esig by Nsig.

   ::

    gmt velo << END -h2 -R-10/10/-10/10 -W0.25p,red -Ggreen -L -Se0.2/0.39/18
        -B1g1 -Jx0.4/0.4 -A1c+p3p+e -V -pdf test
    #Long. Lat. Evel Nvel Esig Nsig CorEN SITE
    #(deg) (deg) (mm/yr) (mm/yr)
    0. -8. 0.0 0.0 4.0 6.0 0.500 4x6
    -8. 5. 3.0 3.0 0.0 0.0 0.500 3x3
    0. 0. 4.0 6.0 4.0 6.0 0.500
    -5. -5. 6.0 4.0 6.0 4.0 0.500 6x4
    5. 0. -6.0 4.0 6.0 4.0 -0.500 -6x4
    0. -5. 6.0 -4.0 6.0 4.0 -0.500 6x-4
    END

This example should plot some residual rates of rotation in the Western
Transverse Ranges, California. The wedges will be dark gray, with light
gray wedges to represent the 2-sigma uncertainties.

   ::

    gmt velo << END -Sw0.4/1.e7 -W0.75p -Gdarkgray -Elightgray -h1 -D2 -Jm2.2i
        -R240./243./32.5/34.75 -Baf -BWeSn -pdf test
    #lon lat spin(rad/yr) spin_sigma (rad/yr)
    241.4806 34.2073 5.65E-08 1.17E-08
    241.6024 34.4468 -4.85E-08 1.85E-08
    241.0952 34.4079 4.46E-09 3.07E-08
    241.2542 34.2581 1.28E-07 1.59E-08
    242.0593 34.0773 -6.62E-08 1.74E-08
    241.0553 34.5369 -2.38E-07 4.27E-08
    241.1993 33.1894 -2.99E-10 7.64E-09
    241.1084 34.2565 2.17E-08 3.53E-08
    END

`Kurt L. Feigl <http://www.geology.wisc.edu/~feigl/>`_, Department of Geology and
Geophysics at University of Wisconsin-Madison, Madison, Wisconsin, USA

See Also
--------

:doc:`gmt </gmt>`, :doc:`basemap </basemap>`, :doc:`plot </plot>`
