The Center for Geographic Analysis is developing WorldMap (http://worldmap.harvard.edu/), an open source platform designed to encourage collaboration between researchers who need access to geospatial information. Despite the many ways in which research materials can now be accessed and shared across the web, the methods suitable for geospatial materials lag. The reasons are many and interconnected: 1) the sparse implementation of standards, 2) the size and complexity of geospatial datasets, 3) the lack of a platform to support geospatial collaboration that is easy to access, 4) the lack of an incentive for researchers to upload geospatial datasets to a system that supports eventual sharing. WorldMap attempts to address all of these problems. Participants will learn about how WorldMap works and how to use it to become an accomplished online map maker.