Holcombe Coughlin & Associates

GeoCalculator (full description and download...), based on the style of Windows Calculator, handles a large number of geological structural and geometrical calculations, conversions between various orientation conventions, and drillhole calculations for oriented, partially oriented, and unoriented core. [Limitations of unregistered version...]

Strain Calculator presents strain data and calculations graphically and numerically. Conversions of strain ratios to stretches at a given volume change can be plotted directly onto a logarithmic strain plot (see screen shot ). Shear zone parameters (ellipticity, deformed and undeformed orientations, etc.) for any shear strain value or general shear vorticity number are calculated and shown graphically (see screen shot ). These tools have been developed principally as a teaching aid, and, in particular, I find the shear zone graphics a very useful way to demonstrate the development of shape fabrics ( further information ). [Installation instructions]

GeoFryPlots performs strain analyses using the Fry point-to-point method. Data can be either read in from an ascii file (as pairs of x,y coordinates) or can be digitised directly into a data window using the mouse. Bitmap images to be digitised can be loaded into the data window from file. Fry plots are displayed in a separate FryPlot window within which a best-fit strain ellipse to the plot can be constructed using the mouse. Data and plot windows can be printed or copied to the clipboard, and digitised data can be saved to file. - see bugfix history for most recent changes.

The following link downloads the zipped .exe file alone [50kb] for those who have installed a recent version of GEOrient, GeoCalculator, or GeoFryPlots and who don't wish to download all the installation files. Only do this if you have downloaded any of these programs and know how to overwrite the old .exe files] [Installation instructions]

GeoMapSymbol is a utility to plot geological structural symbols in a MapInfo mapper (see screen shot ). The registered version includes >50 predefined structural symbols and the ability to create new user-defined symbols or modify existing ones. The unregistered version is fully functional except that only 10 pre-defined symbols are included. See the help file, GEOMAPSYMBOL.HLP, for full instructions for using GeoMapSymbol. GEOMAPSYMBOL.HLP can be run directly from within windows or can be accessed from within the GeoMapSymbol Help menu]. - see bugfix history for this version.  [Version 2 was previously released as GeoSymbol]

Registration for this software is now free. Until I get around to compiling a version without the Registration module please use the following registration codes to make all the symbols available Enter the codes exactly as written into the appropriate textboxes in the registration module:
User Name: Gratis_RJH
Serial No: 51002
Key Code: 5002-2051-7336-1966
[End Registration details]