This document discusses open social mapping, which combines actor modeling, social network analysis, crowdsourcing, and customer relationship management tools to allow stakeholders to map themselves. This helps designers understand social systems from the perspectives of real stakeholders. Benefits include centering stakeholders, identifying disconnects, increasing understanding of diversity, and facilitating shared understanding between stakeholders. Challenges include maintaining participation, addressing privacy concerns, and ensuring interoperability between maps. Examples of open social mapping projects in Canada are provided.