{"id":101400,"date":"2026-05-11T10:51:20","date_gmt":"2026-05-11T10:51:20","guid":{"rendered":"https:\/\/geostru.ai\/en\/gms-nx\/"},"modified":"2026-07-08T14:16:29","modified_gmt":"2026-07-08T14:16:29","slug":"gms","status":"publish","type":"page","link":"https:\/\/geostru.ai\/de\/products\/gms\/","title":{"rendered":"GMS NX"},"content":{"rendered":"
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GMS NX<\/h1>\n<\/div><\/div>\n\n

Geomechanical survey of rock-mass discontinuities in the browser \u2014 from the compass-and-clinometer field reading to the 2D and 3D stereonet, the Fisher statistics and the Markland kinematic test, following the ISRM recommendations. With AI-assisted import, a smartphone compass companion and a ready-to-deliver Word report.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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GMS NX<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n
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What it does<\/h2>\n<\/div><\/div>\n\n

GMS NX is the web generation of GeoStru's program for geo-structural surveys of discontinuities in rock masses \u2014 the compass-and-clinometer method of the ISRM Suggested Methods, brought into the browser and enriched with a 3D stereonet, a native map, AI import and a smartphone compass.<\/p>\n<\/div><\/div>\n\n

ISRM field survey<\/strong> \u2014 orientation and the full set of ISRM descriptive parameters \u2014 aperture, spacing, persistence, roughness \u2014 recorded per discontinuity, following the ISRM Suggested Methods.<\/p>\n<\/div><\/div>\n\n

2D and 3D stereonet<\/strong> \u2014 equal-area Schmidt\u2013Lambert or equal-angle Wulff projection, and a rotatable 3D sphere with poles, great circles and wedges.<\/p>\n<\/div><\/div>\n\n

Joint sets and statistics<\/strong> \u2014 automatic spherical k-means clustering and Fisher statistics \u2014 concentration parameter k, confidence cone \u03b1\u2089\u2085 and mean resultant R\u0302.<\/p>\n<\/div><\/div>\n\n

Markland kinematic test<\/strong> \u2014 planar sliding, wedge and toppling checks against the slope face, with an operational verdict and suggested countermeasures.<\/p>\n<\/div><\/div>\n\n

AI import and Compass NX<\/strong> \u2014 extract orientations from free text, PDFs or photos, and survey in the field with the Compass NX smartphone app.<\/p>\n<\/div><\/div>\n\n

Deliverables<\/strong> \u2014 a structured Word report on the ISRM 15-column scheme, plus DXF, CSV, SVG and PNG; projects autosaved to the cloud.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Stereonet and statistics<\/h2>\n<\/div><\/div>\n\n

Every measurement becomes a point on the sphere, and the joint sets emerge from statistics you can inspect.<\/p>\n<\/div><\/div>\n\n

Projections<\/strong> \u2014 equal-area (Schmidt\u2013Lambert) or equal-angle (Wulff), polar or equatorial, upper or lower hemisphere, toggled live.<\/p>\n<\/div><\/div>\n\n

Great circles and poles<\/strong> \u2014 mean-plane great circles per joint set, with a Pole \/ Great circle \/ Both toggle.<\/p>\n<\/div><\/div>\n\n

Fisher statistics<\/strong> \u2014 the concentration parameter k, the confidence cone \u03b1\u2089\u2085 and the magnitude of the resultant R\u0302, with 1-NN spherical assignment to sets.<\/p>\n<\/div><\/div>\n\n

Distributions<\/strong> \u2014 a dip-direction rose, Denness isodensity over 100 spherical cells and ISRM modal histograms of aperture, spacing and persistence.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Markland kinematic analysis<\/h2>\n<\/div><\/div>\n\n

The kinematic test tells you which failure modes the slope geometry allows \u2014 and what to do about them.<\/p>\n<\/div><\/div>\n\n

Failure modes<\/strong> \u2014 planar sliding and wedge failure per Hoek & Bray (1981) and toppling per Goodman & Bray (1976), checked against the slope face and the friction angle.<\/p>\n<\/div><\/div>\n\n

Operational verdict<\/strong> \u2014 the critical kinematisms are counted and flagged, with the reminder that Markland is necessary but not sufficient \u2014 it confirms geometric compatibility, not stability.<\/p>\n<\/div><\/div>\n\n

Countermeasures<\/strong> \u2014 suggested stabilisation works for the preliminary design \u2014 scaling, rock bolting, anchors, rockfall nets, reinforced shotcrete and sub-horizontal drains.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Field survey, Compass NX and import<\/h2>\n<\/div><\/div>\n\n

The orientations can reach GMS NX from the field, from a file or from a photo.<\/p>\n<\/div><\/div>\n\n

Compass NX<\/strong> \u2014 an installable smartphone app (iOS and Android, the evolution of eGeoCompass) with the native compass and clinometer, GPS, photo and voice note per joint; transferred to the desktop with a six-digit code \u2014 no Wi-Fi and no shared account.<\/p>\n<\/div><\/div>\n\n

AI import<\/strong> \u2014 automatic extraction of dip and dip-direction from unstructured text, legacy PDF reports or heterogeneous tables.<\/p>\n<\/div><\/div>\n\n

3D point cloud<\/strong> \u2014 import .PLY, .OBJ or .XYZ from drone photogrammetry or LiDAR, with RANSAC extraction of the discontinuity planes.<\/p>\n<\/div><\/div>\n\n

Native map<\/strong> \u2014 OpenStreetMap, topographic and satellite backgrounds, with each joint in decimal lat\/lon and UTM coordinates.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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How it works<\/h2>\n<\/div><\/div>\n\n

A guided flow takes you from the field reading to the delivered report.<\/p>\n<\/div><\/div>\n\n

1 \u00b7 Survey<\/strong> \u2014 read each discontinuity with the compass and clinometer \u2014 or with Compass NX \u2014 and record its ISRM parameters.<\/p>\n<\/div><\/div>\n\n

2 \u00b7 Import<\/strong> \u2014 bring the data in from Compass NX, a file (.gms, .pol, .csv), AI import or a 3D point cloud.<\/p>\n<\/div><\/div>\n\n

3 \u00b7 Joint sets<\/strong> \u2014 cluster the orientations into sets with spherical k-means and review the Fisher statistics.<\/p>\n<\/div><\/div>\n\n

4 \u00b7 Stereonet<\/strong> \u2014 inspect the poles, great circles and distributions in 2D and in the 3D sphere.<\/p>\n<\/div><\/div>\n\n

5 \u00b7 Kinematic test<\/strong> \u2014 run the Markland analysis against the slope face and friction angle for planar, wedge and toppling modes.<\/p>\n<\/div><\/div>\n\n

6 \u00b7 Report<\/strong> \u2014 export the Word report on the ISRM 15-column scheme, with the stereonets, roses and histograms as high-resolution figures.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Inputs and outputs<\/h2>\n<\/div><\/div>\n\n

What you enter<\/h3>\n<\/div><\/div>\n

Orientations<\/strong> \u2014 dip and dip direction per discontinuity, plus the ISRM descriptive parameters.<\/p>\n<\/div><\/div>\n\n

Slope and rock<\/strong> \u2014 the slope face orientation and the friction angle for the kinematic test.<\/p>\n<\/div><\/div>\n\n

Sources<\/strong> \u2014 manual entry, Compass NX, .gms\/.pol\/.csv files, AI import or a 3D point cloud.<\/p>\n<\/div><\/div>\n\n

What you get<\/h3>\n<\/div><\/div>\n

Stereonets<\/strong> \u2014 2D and 3D projections with poles, great circles and wedges.<\/p>\n<\/div><\/div>\n\n

Statistics<\/strong> \u2014 joint sets with Fisher k, \u03b1\u2089\u2085 and R\u0302, and the ISRM distributions.<\/p>\n<\/div><\/div>\n\n

Kinematic verdict<\/strong> \u2014 the critical planar, wedge and toppling modes with suggested countermeasures.<\/p>\n<\/div><\/div>\n\n

Deliverables<\/strong> \u2014 a Word report on the ISRM 15-column scheme, plus DXF, CSV, SVG and PNG, cloud-autosaved.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Who it's for<\/h2>\n<\/div><\/div>\n\n

Applied geologists \u00b7 Geotechnical and geomechanical engineers \u00b7 Rock-slope consolidation designers \u00b7 Consultancies and construction firms \u00b7 Universities. GMS NX is for anyone who surveys rock-mass discontinuities and assesses rock-slope stability \u2014 along excavation faces, slopes, tunnels and coastal cliffs \u2014 and wants the whole workflow, from compass to report, in one web app.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Why it's different<\/h2>\n<\/div><\/div>\n\n

Runs in the browser \u2014 no installs, no hardware keys, projects autosaved to the cloud.<\/p>\n<\/div><\/div>\n\n

A rotatable 3D stereonet with poles, great circles, wedges and the slope plane in perspective.<\/p>\n<\/div><\/div>\n\n

AI import that reads orientations from free text, PDFs and photos.<\/p>\n<\/div><\/div>\n\n

Compass NX on the phone \u2014 GPS, photo and voice note, transferred by a six-digit code.<\/p>\n<\/div><\/div>\n\n

A native map (OSM, topographic, satellite) with UTM and lat\/lon to six decimals.<\/p>\n<\/div><\/div>\n\n

Point-cloud import from LiDAR and photogrammetry, with plane extraction in 3D.<\/p>\n<\/div><\/div>\n\n

The Markland verdict paired with typical stabilisation works for the preliminary design.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Frequently asked questions<\/h2>\n<\/div><\/div>\n\n

How many measurements do I need?<\/strong>
At least about 30 orientations for meaningful statistics, ideally 50\u2013150 per face.<\/p>\n<\/div><\/div>\n\n

The Markland banner is green but the slope looks unstable \u2014 why?<\/strong>
Markland is necessary but not sufficient: it only confirms that the geometry is compatible with a failure mode, not that the slope is stable.<\/p>\n<\/div><\/div>\n\n

Which files can I import?<\/strong>
GMS files (.gms, .pol), .csv and eGeoCompass data, and 3D point clouds as .ply (ASCII), .obj or .xyz \u2014 convert .las in CloudCompare first.<\/p>\n<\/div><\/div>\n\n

Can I survey from a phone?<\/strong>
Yes, with Compass NX on Chrome for Android or Safari on iOS 13+; it uses the phone's compass and clinometer over HTTPS.<\/p>\n<\/div><\/div>\n\n

How is the phone data transferred to the PC?<\/strong>
With a six-digit code valid for 30 days \u2014 no Wi-Fi and no shared account needed.<\/p>\n<\/div><\/div>\n\n

Is GMS NX free?<\/strong>
It is part of the GeoStru NX suite with a freemium plan: free unlimited access, with premium features such as AI import on subscription.<\/p>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n

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Ready to start with GMS NX?<\/h2>\n<\/div><\/div>\n\n

Choose your plan and start using GMS NX today. Runs in the browser, always up to date, no installation required.<\/p>\n<\/div><\/div>\n\n\n\n\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":101181,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_ai_seo_pilot_schema_type":"auto","footnotes":""},"class_list":["post-101400","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/pages\/101400","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/comments?post=101400"}],"version-history":[{"count":11,"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/pages\/101400\/revisions"}],"predecessor-version":[{"id":102105,"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/pages\/101400\/revisions\/102105"}],"up":[{"embeddable":true,"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/pages\/101181"}],"wp:attachment":[{"href":"https:\/\/geostru.ai\/de\/wp-json\/wp\/v2\/media?parent=101400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}