To establish interoperability in local digital twins, leveraging existing tools and frameworks like global standards from organizations such as the Open Geospatial Consortium is crucial. This involves defi ning the digital twin’s scope, identifying stakeholders and their data, conducting pilot projects using open standards, and fostering a community among stakeholders to ensure robust, scalable solutions. This learning unit covers the structured approach to developing a data sharing and interoperability strategy for local digital twins. It guides learners through phases of data sharing and interoperability strategy development. The unit aims to teach scalable application methods enhancing interoperable open and secure data for Local Digital Twins.