Lithotheque by GeoStratum

A geological field notebook designed for ownership, speed, and scientific confidence.

Capture, enrich, and preserve geological observations with a workflow engineered for offline reality and controlled AI usage.

Download on Google Play User Manual User Guide (AI) Map Layers Guide Legal Notice (App)

Edge AI Architecture

The 21-Pass Multi-Scale Engine

Standard AI models resize your photo to a single fixed resolution — destroying micro-crystalline detail in the process. Our engine runs 21 parallel inference passes to capture both macroscopic structure and microscopic mineralogy simultaneously.

Dolomitic Limestone sample — Calcaire dolomitique analysé par le moteur 21-Pass de Lithotheque — Calcaire dolomitique — © 2026 Lohan Guyon (Bretteville-sur-Laize, France). Tous droits réservés.

×16

Fine Passes — 4×4 Grid

Micro-details, crystal texture & mineral extraction

×4

Medium Passes — 2×2 Grid

Regional texture & structural features

×1

Global Pass — Full Frame

Overall sample context & shape analysis

Weighted score aggregation → Final class + confidence

104 Geological classes

18.4ms NPU latency (INT4)

14 500+ Training images

100% Offline, on-device

Turn your smartphone into a geological field assistant.

Lithotheque is the professional application designed for geologists, Earth science students, paleontologists, and mineralogy enthusiasts. Replace your paper notebook, compass, and maps with a complete, secure, fully offline digital solution.

CORE FEATURES:

Mapping & Geolocation

Specialized basemaps: Access global geological maps (Macrostrat) and French maps (BRGM / InfoTerre).
Offline mode: Download and cache map tiles to work in remote areas without any internet connection.
Geolocation: Automatic GPS coordinate capture (Latitude, Longitude, Altitude) and address conversion.

Structural Measurement Tools

Integrated compass & clinometer: Instantly measure dip and strike/azimuth directly on outcrops.
Stereonet: Visualize structural measurements on Schmidt or Wulff diagrams and compute mean vectors.
Augmented reality (AR): Locate sampling points and visualize distances/orientations in real time through the camera.

Digital Field Notebook

Detailed records: Capture lithology, stratigraphy (integrated ICS chronostratigraphic scale), texture, minerals, fossils, and HCl tests.
Photos & sketches: Take photos and annotate them with sketches directly in the app.
Field checklist: Never leave without essential gear (hammer, hand lens, PPE) thanks to the built-in checklist.

Advanced Artificial Intelligence

Local AI (100% private and offline): Use visual recognition and voice dictation without sending data online.
Scale detection: AI automatically checks whether a scale reference (coin, hammer, pen) is present in sample photos.
Optional cloud assistant: Connect your Gemini API key to enrich descriptions and geological context.

Exports & Reports

Standard formats: Export to CSV, GeoJSON, GPX, KML, and GeoPackage (GPKG) for QGIS, ArcGIS, or Google Earth.
PDF reports: Automatically generate printable PDF sheets from your observations.
ZIP backup: Archive all your data and images into a portable ZIP file.

Privacy & Security

Local-first: Your data stays on your device. No account creation required.
Encryption: Your personal API keys are protected with AES-256.

Whether you work in mapping, sedimentology, metamorphism, or sample collection, Lithotheque supports you from the lab to the most remote field locations.

Video Presentation

Interface & Tools

Compliance and Transparency

Read the complete multilingual privacy and legal notice prepared for platform compliance and scientific users.

Legal Notice & CGU