NeighborVis is a visual analytics system that allows users to study human mobility and opinion data in a community neighborhood. It is developed to answer the simple questions about an urban community: what is happening at this location, is it good or bad, and can outcomes be improved? It may be a police department considering a blighted street, a planning department considering urban renewal and the "greening" of spaces, a community group wanting to add neighborhood gardens, or a hospital mining its child injury data.