GeoStratum
Lithotheque

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)
Premium

Free App with Premium Features

Lithotheque is a 100% free geological field notebook. An optional premium license unlocks professional mapping, offline AI, and advanced GIS features to push your research further.

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    Offline Edge AI Classifier

    Run the 21-Pass Multi-Scale engine locally on NPU/GPU without internet.

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    Custom Map Overlays

    Import local MBTiles maps or configure custom online WMS/WMTS streams.

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    Advanced GIS Exports

    Export observation tracks and polygons in GeoJSON, GPKG, KML, and GPX formats.

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    Unlimited PDF Sheets

    Generate high-resolution printable PDF field sheets without daily quotas.

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License Deployment

Manage and distribute volume licenses for your teams, students, or organizations. Contact communication@geostratum.eu for quotes or details.

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.
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Fine Passes — 4×4 Grid

Micro-details, crystal texture & mineral extraction

×4
Medium Passes — 2×2 Grid

Regional texture & structural features

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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.
  • Custom maps: Import local MBTiles or online WMS/WMTS.

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.

Multi-Language Support (41 Languages)

Fully translated into 41 languages: Allemand (Deutsch), Anglais (English), Arabe (العربية), Bengali (বাংলা), Bulgare (Български), Catalan (Català), Chinois (中文), Coréen (한국어), Croate (Hrvatski), Danois (Dansk), Espagnol (Español), Estonien (Eesti), Finnois (Suomi), Français, Galicien (Galego), Grec (Ελληνικά), Hébreu (עברית), Hindi (हिन्दी), Hongrois (Magyar), Indonésien (Bahasa Indonesia), Italien (Italiano), Japonais (日本語), Letton (Latviešu), Lituanien (Lietuvių), Néerlandais (Nederlands), Norvégien (Norsk), Ourdou (اردو), Persan (فارسی), Polonais (Polski), Portugais (Português), Roumain (Română), Russe (Русский), Serbe (Српски), Slovaque (Slovenčina), Slovène (Slovenščina), Suédois (Svenska), Tchèque (Čeština), Thaï (ภาษาไทย), Turc (Türkçe), Ukrainien (Українська), Vietnamien (Tiếng Việt).

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

Configuration Requise & Compatibilité

Besoins matériels de l'application Android Lithotheque pour un fonctionnement optimal sur le terrain.

Spécifications Générales

Système & Architecture

  • Android Minimum : Android 12L (API 32)
  • Android Conseillé : Android 14 à 16 (API 37)
  • Architecture CPU : arm64-v8a (64-bit uniquement)
  • Fonctionnalités requises : Caméra, Localisation GPS, Stockage média
Mémoire & Stockage

RAM & Espace Disque

  • RAM Compatible : 4 Go (avec mode allégé automatique pour l'IA)
  • RAM Conseillée : 6 Go minimum pour un usage stable
  • RAM Confortable : 8 Go ou plus (pour les modèles IA avancés)
  • Stockage Minimum : 500 Mo libres
  • Stockage Conseillé : 1 Go à 2 Go libres (pour les cartes hors-ligne)
Appareils Cibles

Profils de Smartphones

  • Minimum Acceptable : Appareil 64-bit avec 4 Go de RAM et Android 12L.
  • Conseillé : Appareil moderne avec 6 Go de RAM ou plus, bon GPU/NPU.
  • Idéal : Google Pixel (6+), Samsung Galaxy (S21+), Xiaomi Pro (avec puces IA dédiées).

Compliance and Transparency

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

Legal Notice (App) Privacy Policy