A method of inferring the GPS location of a device with a GPS receiver is disclosed. The method includes using signals from two GPS satellites to determine two candidate GPS locations. Geographic information can be used to estimate the probability that the device is at each location. If one of the two candidate GPS locations has a substantially higher probability of being the correct location, that location may be selected as the inferred GPS location. The method may also include making use of additional sensed data that could be provided using sensors onboard the device.

A computer-implemented method of generating and broadcasting telematics and/or image data is provided. Telematics and/or image data may be collected, with customer permission, in real-time by a mobile device (or a Telematics App running thereon) traveling within an originating vehicle. The telematics data may include acceleration, braking, speed, heading, and location data associated with the originating vehicle. The mobile device may generate an updated telematics data broadcast including up-to-date telematics data at least every few seconds; and then broadcast the updated telematics data broadcast at least every few seconds via wireless communication to another computing device to facilitate alerting another vehicle or driver of an abnormal traffic condition or event that the originating vehicle is experiencing. An amount that an insured uses or otherwise employs the telematics data-based risk mitigation or prevention functionality may be used with usage-based insurance, or to calculate or adjust insurance premiums or discounts.

A computer-implemented method of generating and broadcasting telematics and/or image data is provided. Telematics and/or image data may be collected, with customer permission, in real-time by a mobile device (or a Telematics App running thereon) traveling within an originating vehicle. The telematics data may include acceleration, braking, speed, heading, and location data associated with the originating vehicle. The mobile device may generate an updated telematics data broadcast including up-to-date telematics data at least every few seconds; and then broadcast the updated telematics data broadcast at least every few seconds via wireless communication to another computing device to facilitate alerting another vehicle or driver of an abnormal traffic condition or event that the originating vehicle is experiencing. An amount that an insured uses or otherwise employs the telematics data-based risk mitigation or prevention functionality may be used with usage-based insurance, or to calculate or adjust insurance premiums or discounts.

The embodiments of the invention provide a method for locating, in a railroad frame of reference, a mobile vehicle traveling on railroad tracks of a railroad network. The method determines one or more railroad track segments on which the mobile vehicle is likely to be located by querying a cartographic database based on at least one location parameter. The cartographic database comprises data representing a vectorial description of at least one railroad track of the railroad network and data representing a description of one or more objects of the environment adjacent to the railroad tracks of the railroad network likely to interfere with the navigation signals received by the mobile vehicle. The method includes a step of generating the cartographic database comprising the steps of: receiving a measurement point cloud classified and geolocated in a coordinate system, the measurement point cloud being associated with the railroad network and with the adjacent environment, determining the topology of the railroad network based on geolocated and classified measurement points associated with the railroad network and a plurality of additional elements of the railroad network, modeling the geometry of the railroad tracks of the railroad network as a plurality of modeled railroad track segments, determining, from geolocated and classified measurement points associated with the adjacent environment, one or more adjacent objects, each of the adjacent objects being associated with one or more modeled railroad track segments, identifying, for each association between an adjacent object and one or more modeled railroad track segments, information representing the interference affecting the navigation signals.

The embodiments of the invention provide a method for locating, in a railroad frame of reference, a mobile vehicle traveling on railroad tracks of a railroad network. The method determines one or more railroad track segments on which the mobile vehicle is likely to be located by querying a cartographic database based on at least one location parameter. The cartographic database comprises data representing a vectorial description of at least one railroad track of the railroad network and data representing a description of one or more objects of the environment adjacent to the railroad tracks of the railroad network likely to interfere with the navigation signals received by the mobile vehicle. The method includes a step of generating the cartographic database comprising the steps of: receiving a measurement point cloud classified and geolocated in a coordinate system, the measurement point cloud being associated with the railroad network and with the adjacent environment, determining the topology of the railroad network based on geolocated and classified measurement points associated with the railroad network and a plurality of additional elements of the railroad network, modeling the geometry of the railroad tracks of the railroad network as a plurality of modeled railroad track segments, determining, from geolocated and classified measurement points associated with the adjacent environment, one or more adjacent objects, each of the adjacent objects being associated with one or more modeled railroad track segments, identifying, for each association between an adjacent object and one or more modeled railroad track segments, information representing the interference affecting the navigation signals.

Devices, systems, and methods of navigation in tracks and trails. A system includes a smartphone or other portable electronic device. The system generates and provides navigation data and mapping data to travelers, particularly in walking trails; and generates a video clip or other multimedia presentation that incorporates trip data, images, audio, and a reconstructed map of the route. An administrator or operator of a nature center or an attraction or other venue, operates the system to obtain real-time information about travelers within the venue, and to selectively provide data and messages to some or all of such travelers.

To provide a positioning apparatus which can reduce the error of the positioning information of the positioning satellite, by using either appropriate one of the positioning reinforcement information by the ground channel or the positioning reinforcement information by the satellite channel, according to execution state of the automatic driving. A positioning apparatus receives positioning information from positioning satellites; calculates a first own position based on the positioning information and the positioning reinforcement information of the ground base station; calculates a second own position based on the positioning information and the positioning reinforcement information of the satellite; determines either the first own position or the second own position to be used, based on whether or not the driving mode is the automatic driving mode; and outputs the first own position or the second own position determined to be used, as a final own position.

A method and associated system are provided for determining a yaw heading (θ.sub.heading) of a wind turbine, the wind turbine having a tower and a nacelle that includes a machine head and rotor at a top thereof. The method includes configuring a single rover receiver of a global navigation satellite system (GNSS) at a fixed position relative to the nacelle. A GNSS geographic location of a tower top pivot point (TPP) of the wind turbine is determined, as well as an angular offset of the rover receiver (β.sub.rover) relative to a centerline axis of the nacelle. Based on the GNSS geo-location of the TPP and a GNSS geo-location of the rover receiver, an angular vector () relative to North of a line between the TPP and the rover receiver is determined. The yaw heading (θ.sub.heading) is computed from a difference between the angle () and the angular offset (β.sub.rover) of the rover receiver.

A non-transitory computer readable storage medium has instructions executed by a processor to adaptively increase Markov chain kernel window width while processing global positioning system (gps) samples as a function of the ratio between geodesic distances of a current route to an actual geodesic distance between pairs of gps samples. The total cost of different kernel sequences is found based on an aggregated sum of shortest path runs through graph edges within different kernel sequences. Road weights are modified based on relative distance of prospective snap locations of road segments to the gps points, so that the shortest path runs with respect to all possible snap locations are selected. Selected kernel sequences are presented as a proposed mapped vehicle route.

A method of correlating satellite position data with terrestrial features may include: Using a geometric snapping algorithm to correlate the satellite position data and terrestrial survey data and snap the satellite position data to the terrestrial features; determining whether the satellite position data can be snapped to unique terrestrial features; and using a hybrid space-time snapping algorithm to correlate the satellite position data and terrestrial survey data and snap the satellite position data to unique terrestrial features when the satellite position data cannot be snapped to unique terrestrial features.