Abstract: Technology is described for determining a location at which a computing device is positioned. For example, a computing device is positioned in an area (e.g., building), and a map (e.g., floor plan) is retrieved that depicts the area. An initial location of the computing device is determined with respect to the map. Inertial sensors record motion inputs (e.g., acceleration, orientations, etc.), which are analyzed to determine a path along which the computing device moves. The path is applied to the initial location to determine an updated location at which the computing device may be located.