Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for determining categories for geographic data. In general, one aspect includes a method implemented by one or more processing devices that includes receiving, by one or more processors, geographic information data from a database, the geographic information data comprising location points and being divided into geographic areas, at least some of the geographic areas containing one or more location points, at least some of the location points being associated with at least one category, identifying, by one or more processors, for at least some of the geographic areas, a dominant category, based on categories associated with the location points contained within the geographic areas, and storing, by one or more processors, the dominant category in association with the respective geographic area in the database.