Stereonet Software for Field and Structural Geology

The full structural analysis platform: stereonets, contouring, rose diagrams, kinematic analysis, and map-based analysis, all in your browser.

Coming soon

Stereogram Go

The free field-capture companion for iPhone: compass-mode measurements, on-device stereonet, and live sync with Stereogram Pro.

Try it free, no signup

Replace 5 legacy programs with one platform. A stereonet package, a spreadsheet, a fault-kinematics tool, a GIS and a separate field app. Stereogram takes on the whole stack, priced for students and professionals alike.

What Stereogram does

Stereonet software built for structural geology

Stereogram carries orientation data from the outcrop to the finished figure. Plot planes, poles and lineations on equal-area Schmidt or equal-angle Wulff stereonets; contour pole densities with Kamb or percent-area methods; resolve fold axes, joint sets and fault kinematics; and keep every measurement on a map beside the plots. It runs entirely in the browser on Windows and macOS, with a free iPhone companion for capturing measurements in the field coming soon.

Stereonets, rose diagrams and density contouring

Stereogram Pro is the full analysis platform. Analysis runs client-side in your browser, so your data stays on your machine unless you choose to sync it.

Equal-area (Schmidt) and equal-angle (Wulff) projections, with planes, poles, lineations and slip arrows

Density contouring: three Kamb methods (standard, linear, exponential) plus percent-area (Schmidt 1%)

Rose diagrams for strike, dip-direction and trend distributions, with per-bin statistics

Fault kinematic analysis with slip-sense, P/T-axis and Bingham-style solutions

An integrated map view with satellite and topographic basemaps, linked live to the plots

Import from CSV, GeoJSON, StraboSpot and FieldMove; export to PDF, PNG, SVG, CSV and GeoJSON

Measure orientations in the field on iPhoneComing soon

Stereogram Go is the free field companion. Take strike and dip in compass mode, check the population on an on-device stereonet before you leave the outcrop, and sync both ways with Stereogram Pro when you are back on a connection. Measurements collected offline queue up and push when the phone reconnects.

Go has not reached the App Store yet. Stereogram Pro is live today and does not depend on it.

Every published structural measurement, in one map

The Structural Measurement Atlas is our compilation of the public record: more than 800,000 bedding, foliation, joint, cleavage, fault, vein and lineation measurements digitized from state survey quadrangles, USGS data releases, NGMDB legacy maps and National Park Service geodatabases — converted to one azimuth convention, reprojected to WGS 84, and carrying the citation of the map each one came from.

It is free and needs no account. Lasso an area and the stereonet, rose diagram and table follow your selection, then export it as CSV — source citations, confidence tiers and the publishers’ original field names travel with the rows, and Stereogram Pro imports the file directly.

Worked examples with open structural data

Each of these walks through a complete analysis on a published dataset you can download and load yourself.

How many joint sets? 725 mapped fractures from Canyonlands, and how one threshold decides your set count

How to find a fold axis: pi diagram, mean lineation and measured hinges compared on 2,100 measurements from Voyageurs

When to pool orientation data: 1,042 Grand Canyon joints that show no preferred orientation until you split them into domains

Fault kinematics and P/T axes: why every striated fault returns an answer, and how to tell when it means something