1. A method comprising: receiving, by a server computing device via an electronic communications network and from a client device's user interface including a map display, a query requesting a new map display, the requested new map display comprising a plurality of base tiles; identifying, by the server computing device, a plurality of predetermined region of interest (ROI) map tiles associated with the requested new map display, each predetermined ROI map tile comprising a respective base tile customized to include information associated with a respective user interest category of a plurality of different user interest categories, the each predetermined ROI map tile may be used as a replacement for the respective base tile in the new map display, each user interest category of the plurality of different user interest categories having a number of associated predetermined ROI map tile replacements for a corresponding number of the base tiles to include at least one feature of interest specific to the each user interest category in the new map display; replacing, by the server computing device before serving the new map display to the client device, each of a selected number of the base tiles in the new map display with a corresponding selected one of the predetermined ROI map tiles associated with the respective user interest category of the plurality of different user interest categories to customize the new map display to include the respective user interest category's associated information comprising the at least one feature of interest specific to the respective user interest category; and serving, by the server computing device to the client computing device via the electronic communications network, in response to the query, the new map display for display by the user interface at the client device, the served new map display comprising both base tiles which are not replaced by any of the predetermined ROI map tiles and the selected number of the predetermined ROI map tiles replacing the selected number of base tiles in the new map display.