Patent ID: 9163943
Filing Date: 2015-10-20
Classification: G01B,G01C,G01S,G01V

Abstract:
1. A method for revising location estimates, the method comprising: obtaining, by one or more computing devices, a plurality of readings of a magnetic field collected by a magnetometer of a device, wherein the plurality of readings are respectively associated with a plurality of location estimates of the device along a location path, wherein each of the one or more computing devices comprises one or more processors; identifying, by the one or more computing devices, a plurality of regions of interest of the plurality of readings along the location path; comparing, by the one or more computing devices, each of the plurality of regions of interest of the plurality of readings with at least one other of the plurality of regions of interest to identify a plurality of correspondences; and revising, by the one or more computing devices, at least one of the plurality of location estimates based at least in part on the plurality of correspondences.