Methods and systems for modifying a location history of a computing device are described. An example method may include receiving sensor data collected by one or more sensors of a computing device, and receiving a history of geographic locations of the computing device determined based on the sensor data collected by the computing device and additional data from one or more sources. The method may also include receiving updated additional data from the one or more sources, and reprocessing at least a portion of the sensor data with the updated additional data to determine one or more updates to the history of geographic locations of the computing device. The method may further include modifying the history of geographic locations of the computing device based on the one or more updates to provide an updated history of geographic locations of the computing device.