This document summarizes lessons learned from coordinating data collection efforts during the humanitarian response to crises in Japan and Libya in 2011. It identifies three levels of data that need to be coordinated: common operational datasets, community indicator data, and crisis-specific data. It notes the need for open data profiles at the local level and for GIS practitioners to enhance crisis mapping. Challenges included language barriers, coordination difficulties, and a lack of crisis information sharing from local governments. Improved planning, recruitment, communication and use of project management tools were recommended for future efforts.