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Gmane
From: Joe Kington <joferkington <at> GMAIL.COM>
Subject: Re: Plotting Structural Data on a Stereonet
Newsgroups: gmane.comp.gis.gmt.user
Date: Wednesday 3rd December 2008 03:35:31 UTC (over 8 years ago)
It seems that there were some problems in the first Examples.tar.gz file
that I attached.  Here's a version that should work.

-Joe

On Tue, Dec 2, 2008 at 9:20 PM, Joe Kington <[email protected]> wrote:

> Hi everyone,
>
> I've been plotting a lot of structural data on a stereonet lately, and
> while this is possible in GMT, it can't be done directly.
>
> To make things a bit easier on myself, I put together a python program to
> output lat,long pairs corresponding to the line or point representing a
> strike/dip, plunge/bearing, pole to a plane, or rake measurement. It
reads
> strikes in azimuth or quadrant form, and assumes RHR if no dip direction
is
> given.  It can also "unfold" data (e.g. rotate each measurement so that a
> given strike/dip is horizontal), for simple cases (non-plunging folds).
> Coupled with various GMT tools, you can also plot contours of poles to
> planes, find a best-fit plane to data (using fitcircle), etc.
>
> Forgive me if I'm reinventing the wheel, here, but I don't know of any
> other software to plot data on a stereonet in linux.  Rick Allmendinger's
> software only works on mac and windows and doesn't produce (i.m.h.o.) as
> nice an output as GMT does.  My script makes it much easier to analyze
and
> plot structural data using GMT's various tools.  It requires python 2.3
or
> later, but should work on any platform. (OSX or any recent *nix
distribution
> should already have what you need. Otherwise, just install the latest
> version of python.)
>
> Installation should be as simple as moving the script to somewhere in
your
> $PATH and chmod +x.  More detailed instructions (and instructions for
> windows) are in INSTALLATION.txt.  Also note that "stereonet" alone will
try
> to read from stdin and print to stdout, rather than printing a help
> message.  Try "stereonet --help" to see the usage.
>
> There are several examples in the attached examples.tar.gz file.
>
> Also, the "unfolding" function hasn't been rigorously tested.  It's
> probably best not to use it for anything important.  There undoubtedly
> various bugs, but I think (hope?) its rather robust.
>
> Let me know if anyone finds it useful,
> -Joe
>
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