Digital Pedon: A Digital Twin Framework for Soil Profile Monitoring and Global Interoperability

A dictionary-first Python framework implementing a soil profile digital twin with zero external runtime dependencies. Integrates GPS-based global database initialisation (SoilGrids, SSURGO), real-time IoT sensor ingestion with 14 automatic unit conversions, a chain of four physics-based solvers (Van Genuchten, Darcy–Buckingham, De Vries, Q10), GLOSIS-anchored ontology mapping for 41 canonical soil properties, and an LLM Agentic Interface Layer with 10 OpenAI-compatible tool schemas.Includes: core framework · ontology vocabulary · database connectors · BYOD sensor manifest · LLM dispatcher · 95 automated tests · full documentation and examples.License: CC BY 4.0Citation: Youssef, A. & Badreldin, N. (2026). Digital Pedon v2.0.0. https://github.com/Pierianspring/digital-pedon