Systems and methods for encoding location-based reminders are provided. Data indicative of a request for a location-based reminder can be received. The data indicative of the request can include data indicative of a user placement of a reminder in a visual representation of the geographic area, such as an image captured of the geographic area or a visual representation of the three-dimensional model of the geographic area. A selected location within a three-dimensional model of a geographic area can be identified based on the data indicative of the user placement of the reminder. Three-dimensional geographic coordinates corresponding to the selected location can be determined using the three-dimensional model and associated with the location-based reminder. The location-based reminder can then be triggered based at least in part on signals indicative of user position and/or orientation in the geographic area.