Development of collaborative, perception driven autonomous systems requires the ability for collaborators to compute a rich, shared representation of the environment, and their place in it, in real-time. Using this shared representation, collaborators can communicate geometric, semantic and dynamic information about the environment across frames of reference to one another. Existing state-of-the art dense mapping systems provide a good starting point for developing a collaborative mapping system, however, no system currently covers collaborative mapping directly. In this paper, we introduce our approach to dense collaborative map-ping, offering an introduction to the problem, a discussion of the key challenges involved in developing such a system and an analysis of preliminary results.