This document analyzes several successful data ecosystems through interviews and case studies to identify recommendations for establishing sustainable data ecosystems. It examines local, geospatial, supply chain, agriculture, and disaster management data ecosystems. Key findings include the importance of collaborative governance, distributing value among stakeholders, technical standards, and long-term engagement. The analysis finds that an ecosystem approach to data development is effective and orchestration is crucial for self-sustainability while avoiding new data silos.