The North Rhine-Westphalian Library Service Center (hbz) is a central service and development organization for university libraries in North Rhine-Westphalia and has been a leader in the Open Movement. Through a Request for Proposals process, hbz submitted the strongest proposal to develop an OER World Map. This grant request builds upon a phase I effort (which funded three projects), in which hbz successfully built a prototype in a relatively short time frame. Key deliverables of this grant include: developing a functional website that builds upon existing OER mapping efforts, encouraging interoperability of mapping efforts, fostering international collaboration, and highlighting OER efforts around the world in a way that is easy for a wide variety of audiences to understand. This grant is designed to fill a long-recognized gap in the OER field.