A system displays a map of a geographic area and an icon on a device associated with a first user. The icon represents a second user. The system further displays an indication on the device associated with the first user. The indication represents an area of the map displayed on a device associated with the second user. The system can further display a list of users on the device of the first user. The users on the list have devices associated with them and the devices associated with the users on the list display at least a portion of the map of the geographic area. The system receives input from the first user selecting a user from the list, and displays on the device associated with the first user the portion of the map of the geographic area that is displayed on the device associated with the user selected from the list.