Solearth® Digital Twin (SDT) turns fragmented building information into one continuous digital thread — from as-is capture and IoT sensing to retrofit evaluation, post-retrofit verification and long-term smart O&M.
The platform
SDT is designed for aging offices, public buildings, campuses, residential communities and other existing assets where reliable digital baselines, retrofit decisions and long-term monitoring need to stay connected.
Capture the physical building and connect environmental and structural sensors to the asset.
Turn measured geometry and live data into a shared, traceable digital building baseline.
Use the twin to evaluate interventions, monitor outcomes and support smart O&M decisions.
Retrofit-first workflow
Existing buildings rarely start with a perfect BIM model. SDT starts with the asset that actually exists, then builds a usable digital thread around it.
Use cases
The prototype connects digital evidence to four recurring needs in existing-building renewal.
Digitally represent roof and façade interventions, then retain the same model for post-retrofit performance tracking.
Connect component-level status, utilization logic and multi-level warning concepts to the 3D asset.
Track the collaborative deformation of added elevator shafts and the original building through ongoing monitoring.
Bring temperature, humidity, air quality and PMV-based comfort analysis into one operational view.
Technical evidence
The current SDT prototype was developed from real existing-building work and an award-winning national competition project.
Overall average registration error reported in the current prototype.
Prototype indicator demonstrating the viability of the digital baseline.
Monitoring threshold used in the added-elevator scenario.
Thermal-comfort analysis linked to monitored environmental conditions.
Prototype and scenario metrics are presented as technical evidence from the current project materials; they are not positioned as audited commercial customer guarantees.
Why SDT
SDT is differentiated by continuity: it starts from the existing physical asset, carries retrofit decisions through the same twin, then keeps that model alive for performance verification and long-term operation.
Strong at design coordination, often assumes a reliable digital model already exists.
Strong at live data, but often weak at spatial context and retrofit traceability.
As-is capture + digital model + live sensing + retrofit scenarios + post-retrofit continuity.
SDTOne digital threadCommercial model
SDT combines software subscription with optional site digitization, IoT and professional services. This keeps the platform scalable while allowing each project to match real building conditions.
Final pricing varies with building scale, number of users, enabled modules, sensor integrations, API needs and support level.
Company & team
Solearth® Digital Twin (SDT) is a dedicated digital twin product line established by Solearth Design in 2025 to support university–industry–research collaboration and product innovation in smart building and smart construction.
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Software copyrights: Smart Building O&M Management Software (No. 3923258); Architectural Design Project Information Database Platform (No. 3922279); Architectural Media Content Management System (No. 3923274).
The original smart-building digital twin system received a national first prize in China. SDT now turns that technical foundation into a product with clearer positioning, repeatable deployment and an international SaaS-oriented commercial model.
Pilot with Solearth
SDT is designed for public buildings, offices, campuses, residential communities and other existing assets that need a reliable digital baseline and long-term operational intelligence.