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Rod Holcombe | Tim Coughlin | Nick Oliver
Consulting | 3D modeling | Training | Hydrothermal systems analysis | QA/QC services | Target Generation |
GEOrient | GeoCalculator | GeoMapSymbol | GeoMapVector | Strain Calculator | GeoFryplots | Ghoshflow
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Structural Geology - Mapping/GIS Software

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stereo-rose diagrams

Descriptions and downloads

This site contains Microsoft Windows packages developed by Rod Holcombe for plotting stereographic projections, rose diagrams and wind roses (GEOrient); for structural and oriented drillcore calculations (GeoCalculator); for strain, and shear zone calculations (Strain Calculator); and GIS tools in MapInfo for plotting structural symbols on maps (GeoMapSymbol), calculating vector trends (azimuths) and lengths (GeoMapVector), and extracting nodes from polylines (PolyNodeExtractor).

Software info at a glance

Package link Description
Current version
Current version date
GEOrient© Stereographic projections, rose diagrams, wind roses
Apr 9, 2015New_image Licence*

Structural geology and oriented drillcore calculator

July 12 2013 Licence*
GeoMapSymbol© for MapInfo MapInfo geological structural symbol plotting tool
January 12, 2011 Free
Expanded symbol table of GeoMapSymbol© for MapInfo Definition of 100+ symbols. Replaces the table generated automatically by GeoMapSymbol   May 20, 2009 Free
GeoMapVector for MapInfo MapInfo tool for calculating azimuths and lengths of lines or polylines in map windows
July 28, 2001 Free
PolyNodeExtractorr for MapInfo MapInfo tool for extracting the X & Y coordinates and an optional Z value from the node locations of any point, line, polyline, or region object in an open Mapinfo table
April 21, 2006 Free
Strain Calculator Strain and shear zone calculations, including general plane strain shear
Nov 1, 2009 Free
GeoFryPlots Fry point-to-point strain analysis plots
Mar 20 2004 Free
Ghoshflow Modelling Ghosh & Ramberg-style rotation of rigid objects
Apr 17, 2009 Free
Animations GIF and MOV animations suitable for teaching
1997-2005 Free


The Windows software is specific to Microsoft Windows. (Users have reported that it does not install under Windows emulations on Macs)

*The unregistered packages can be used freely (notes) by academics (teachers and students) for teaching and non-commercial research purposes, but please acknowledge the author in any publication or figure arising from the use of these packages.
For commercial users the unregistered download version can be used for evaluation purposes only for a reasonable interval that must not exceed two months The software must be registered for continued commercial use. Academic users who wish to exceed the plot window restriction of GEOrient, or access the full File I/O capabilities and drillhole calculations of GeoCalculator must also purchase registration.
Although every effort is made to rectify bugs as they are recognised, the author cannot guarantee that these packages are without error, and assumes no responsibility for their use, or for interpretations based on their use.
Frequent field work commitments may occasionally delay my ability to handle email queries promptly

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Address all software correspondence to Rod Holcombe at: Note: I will attempt to answer all email promptly, but I am commonly absent doing field work. Please bear with me if that causes a delay

email for software enquiries:

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