Visualizing Emancipation is a new web resource that is of interest for a number of reasons. First, there is its content: it identifies thousands of actions associated with the end of slavery in the United States. Second, it depicts these actions on an interactive map, thus providing a geographical interface that helps depict when and where slavery was challenged and eventually abolished. It is thus an interesting example of how geographic information systems can be used to expand the scope of humanities scholarship. Lastly, the project uses as a source and links to the digitized edition of the Official Records of War of Rebellion found in Cornell’s “Making of America” digital collection. Thus Visualizing Emancipation is also a good example of how rich new resources can be constructed when there is open access to underlying data.