Modified Kamb contour plot Orient is a fast, easy to use, professional spherical projection and orientation data analysis program. In 1986 Orient introduced modified Kamb contouring (automatic contouring on the sphere), PGR (Point Girdle Random) diagrams, orientation fields, and automated structural domain analysis. Orient 3 brings a new level of accuracy and speed, with many new tools, including interactive data analysis, UTM coordinate conversions, digitizing, and integration with applications such as Microsoft Excel, LibreOffice, Adobe Illustrator, InkScape, and Google Earth.

Circular frequency polygon Orient is for plotting and analyzing orientation data, data that can be described by an axis or direction in space or, equivalently, by a position on a sphere or circle. Examples of data that are represented by unit vectors (directed) or axes (undirected) include geologic bedding planes, fault planes, fault slip directions, fold axes, paleomagnetic vectors, glacial striations, current flow directions, crystallographic axes, earthquake epicenters, cosmic ray arrival directions, comet orbital planes, positions of galaxies, whale migration paths, and the locations of objects on the Earth. Orient has been written to apply to a wide variety data types, however many examples come from structural geology, which requires extensive manipulation and analysis of orientation data.

Paleomagnetic data Spherical projections are used to display three dimensional orientation data by projecting the surface of a sphere, or hemisphere, onto a plane. Lines and planes in space are considered to pass through the center of a unit sphere, so lines are represented by two diametrically opposed piercing points. Planes are represented by the great circle generated by their intersection with the sphere or, more compactly, by their normal.

Kinematic analysis Spherical projections include equal-area (used for creating Schmidt nets), stereographic (used for creating Wulff nets or stereonets), and orthographic projections, these can be plotted on either upper or lower hemispheres. Point distributions are analyzed by contouring and by computing eigenvectors of undirected data, or vector means of directed data. Directed data can be plotted on both upper and lower hemispheres. Data sets and projections can be rotated about any axis in space, or to principal axes. For two-dimensional data, such as wind or current directions, circular plots and circular histograms, including equal-area and frequency polygon diagrams, can be prepared.

Beachball diagram Data can be input as spherical coordinates, longitude and latitude, azimuth and altitude, declination and inclination, trend and plunge, strike and dip, or other measurements. Orient does kinematic analysis of fault data, which is represented by a plane and the direction of slip within that plane, by generating P and T kinematic axes, tangent line diagrams, and beachball plots.

Orient is compiled, tested, and debugged on Macintosh OS X, Windows, and Linux, and runs on Macintosh OS X 10.5 (Leopard) to 10.10 (Yosemite), Windows XP, 7 and 8, and Linux distributions.

Orientation field For installation, download the correct version for your computer using the links in the sidebar (.dmg, .zip, or .tar.gz), and follow the instructions below. For additional details, see the User Manual.

On Macintosh OS X, double click the disk image file (.dmg), and drag the Orient application to your Applications folder, or other desired location. If you get the App Can’t Be Opened alert message when double clicking on the Orient icon, right-click (or control-click) on the icon, choose Open, and click the Open button at the next dialog to launch Orient. Gatekeeper in OS X 10.7 to 10.10 must be set to allow applications other than from the Mac App Store to be opened. To do so, open the System Preferences and the Security & Privacy option. Under General select Allow apps downloaded from: Anywhere.

PGR diagram On Windows, unzip the zip file (.zip) using the Extract All option, and drag the Orient folder to any desired location. The Orient folder contains the Orient application (Orient.exe), and a Resources folder which is required. Make sure to entirely extract the Orient folder from the zip file, this is the most common installation problem.

World earthquakes On Linux unpack the gzip file (.tar.gz), and copy the Orient folder to any desired location. The Orient folder contains the Orient application (orient), and a Resources folder which is required. An application icon (orient.png) is included in the Resources folder if desired for installation.

Folded beddingOrient comes with numerous tutorials in the User Manual to get you up to speed quickly. The Example Data folder should also be copied for use in the tutorials. To deinstall simply delete the Orient application folder, and optionally the preference file. No other files are installed on your computer. No administrative permissions are required to install Orient, and it is possible to keep a copy on a thumb drive to run on any computer.

Orient is flexible, easy to use, delivers the highest quality professional contour plots and graphics, and is completely free. Orient is the result of countless hours of work over three decades, and the only stipulation is that use of the software in analyzing data or preparing diagrams must be cited in publications, presentations, reports, or other works. Please see the User Manual for additional details and license.