C City is the first urban development in Scotland to federate Level 3 OpenBIM with a public blockchain CDE — making every design decision, procurement event, and governance vote permanently auditable and publicly accessible.
BIM Level 3 — as defined by ISO 19650 and the UK BIM Framework — represents the apex of information management maturity: a single, shared, cloud-hosted data environment in which all project participants — architects, engineers, contractors, investors, regulators, and the public — operate from the same live model simultaneously.
C City's CDE (Common Data Environment) goes beyond the standard by anchoring every data transaction to the Ethereum blockchain. Model revisions, clash detection reports, planning submissions, and procurement awards are all hash-stamped on-chain at the moment of issue — creating an immutable, tamper-proof audit trail accessible to any stakeholder with a browser.
The public participation layer — where citizens vote on residential placement and green network routing — is not a consultation exercise. It is a live governance input that propagates directly into the federated model within 24 hours of each voting round closing.
Live IoT sensor data merged with BIM geometry. Real-time structural, energy, and occupancy telemetry. AI anomaly detection on all building systems. Public read access from Stage 8.
Structural, architectural, MEP, and civil models federated via IFC 4.3 open standard. Clash detection automated. All model revisions time-stamped on blockchain CDE.
Individual discipline models authored in Revit, ArchiCAD, and Tekla. Exported to IFC. All LOD (Level of Detail) specifications follow UK BIM Framework standards.
Site survey data, OS mapping, and GIS layers forming the geospatial foundation. NPF4 planning layers integrated. Historic environment and ecology data included.
Industry Foundation Classes open standard ensures vendor-neutral interoperability. No proprietary lock-in. Any ISO 19650-compliant tool can read and write to the CDE.
BIM model hashes stored on Ethereum mainnet. Large file assets pinned to IPFS with on-chain content identifiers. Smart contract governance via OpenZeppelin ERC-3643.
3D geospatial Digital Twin rendered in Cesium.js with real-time AWS IoT sensor data. 2,048 active nodes monitoring structural, energy, and environmental parameters.
Compliant security token standard with on-chain KYC/AML controls. Transfer restrictions enforced by smart contract. FCA sandbox registration active.
Public governance votes hashed on-chain via Snapshot protocol. Token holders receive weighted votes from Stage 7. All vote results publicly verifiable on Etherscan.
Automated compliance reporting to SEPA environmental APIs. BREEAM Outstanding certification target. NPF4 biodiversity gain metrics published on-chain annually.
The Digital Twin is not a rendering or a visualisation — it is a live computational model of C City that runs continuously, ingesting data from 2,048 IoT sensor nodes across the site and updating the BIM model in real time.
During construction, the twin enables automated progress verification: drone photogrammetry is compared against the BIM model daily, and deviations trigger on-chain alerts that prevent milestone payments releasing until resolved.
In operation, the twin drives predictive maintenance — AI models trained on sensor telemetry predict component failures an average of 23 days before they occur, reducing unplanned downtime in the AI Hub to a modelled 0.003% annually.