Software
Software projects written and maintained by Frederick W. Vollmer.
Free Software
The following software is free, with the stipulation that citation be given for usage as noted in the user manuals. These are available in compiled form for Windows, macOS, and Linux platforms. If you find the software useful, please consider making a donation to support its continued development.
Orient is for analyzing data that can be described by an axis or direction, or by a position on a sphere. Examples include latitude and longitude, star locations, bedding planes, fold axes, fault slip directions, paleomagnetic vectors, glacial striations, crystallographic axes, current flow directions, and animal migration paths.
EllipseFit is an integrated program for two and three-dimensional geologic fabric and finite strain analysis. It includes routines to digitize and analyze collections of points, lines, ellipses, and shapes to determine mean fabric and finite strain ellipses from oriented photographs.
Antevs is a program for analyzing varve, tree-ring, and other time-series data. Fourier analysis, and other curve fitting algorithms, are used to remove trends and to normalize the data for comparison. The resulting data series are correlated using cross-correlation techniques to identify potential matches.
Open Source Code
The following are open source software. Citation should be given for their usage, see the accompanying CITATION.md files.
SphereContour C, Pascal, and MATLAB versions of a program for automatic contouring of spherical orientation data using a modified Kamb method to create spherical projections including Schmidt (equal-area) and stereographic (equal-angle) plots.
HyperContour MATLAB script for contouring geologic fabric and finite strain data on the unit hyperboloid, including Rf/phi, Elliott polar, and equal-area fabric plots.
TriFabPlot MATLAB script for plotting directional data orientation tensors of CPO, fabric and finite strain data, including contours of density and intensity indexes.
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| 4 Sep 2021 |