A method for reconstructing a motion track applied to a terminal is provided. The method includes: obtaining a data set, the data set including positioning data obtained by positioning a target object; performing data fitting on target data in the data set to obtain a plurality of segments of first curves, the target data being positioning data obtained by performing noise filtering on the data set; and determining a motion track of the target object based on the plurality of segments of first curves. Counterpart apparatus and non-transitory computer-readable storage medium embodiments are also contemplated.

A position estimation unit 25 estimates, for each movement in a predetermined section, a plurality of position candidates of a position estimation target on the basis of position information and sensor information. A position determination unit 26 evaluates, for each movement in the predetermined section, on the basis of the plurality of position candidates of the position estimation target obtained by the movement in the predetermined section, whether the position information used to estimate the position candidates has an error caused by any of a position of a GPS satellite, a position of a mobile body in a real space, or the mobile body or does not have any error caused thereby. The position determination unit 26 determines a final output value of the position of the position estimation target on the basis of a result obtained by removing, from the plurality of estimated position candidates of the position estimation target in the plurality of times of the movement in the predetermined section, a position candidate of the position estimation target estimated in the movement in the predetermined section that has been evaluated to have the error.

A method for aligning digital maps, in particular by a control unit. Data of a first map present in a first coordinate system and data of a second map present in a second coordinate system are received. At least one trajectory within the first map and at least one trajectory within the second map are ascertained based on the received data. The data of the first coordinate system and the data of the second coordinate system are aligned with one another based on the respective trajectories. A transfer system, a control device, a computer program, and a machine-readable memory medium are also described.

A system for vehicle navigation may include a processor including a circuitry and a memory. The memory may include instructions that when executed by the circuitry cause the processor to receive navigational information associated with the vehicle including an indicator of a location of the vehicle, and determine target navigational map segments to retrieve from a map database. The map database may include stored navigational map segments each corresponding to a real-world area. The determination of the target navigational map segments may be based on the indicator of vehicle location and on map segment connectivity information associated with the stored navigational map segments. The instructions may also cause the processor to initiate downloading of the target navigational map segments from the map database, and cause the vehicle to navigate along a target trajectory included in one or more of the target navigational map segments downloaded from the map database.

A system for collecting and distributing navigation information relative to a road segment is disclosed. In one embodiment, the system includes at least one processor programmed to receive drive information collected from each of a plurality of vehicles that traversed the road segment, wherein the drive information received from each of the plurality of vehicles includes indicators of speed traveled by one of the plurality of vehicles during a drive traversing the road segment; determine, based on the indicators of speed included in the drive information received from each of the plurality of vehicles, at least one aggregated common speed profile for the road segment; store the at least one aggregated common speed profile in an autonomous vehicle road navigation model associated with the road segment; and distribute the autonomous vehicle road navigation model to one or more autonomous vehicles for use in navigating along the road segment.

In exemplary embodiments, methods and systems are provided that include: obtaining, via telematics systems of a plurality of vehicles, vehicle telemetry data as the plurality of vehicles travel through one or more geographic regions; transforming, from a computer processor, the vehicle telemetry data into a geohash encoded format pertaining to the one or more geographic regions; identifying, via a processor, a plurality of road junctions using the vehicle telemetry data that is transformed into a geohashed encoding; identifying, via the processor, a plurality of road segments using the vehicle telemetry data that is transformed into a geohashed encoding for the one or more geographic regions; and generating, via the processor, a road network mapping for the one or more geographic regions that includes the plurality of road junctions and the plurality of road segments utilizing the vehicle telemetry data that is transformed into a geohashed encoding.

Provided is a survey method using a position acquiring device that acquires position coordinates of a worker and a mobile terminal capable of communicating with the position acquiring device. the mobile terminal sets an advancing direction of observation and a first measurement point in three-dimensional design data, and makes the position acquiring device acquire position coordinates of the worker, the mobile terminal guides the worker to the first measurement point, makes the position acquiring device acquire position coordinates of the worker at the first measurement point, and sets a point nearest from the first measurement point in the advancing direction as a second measurement point, and after that, a position of the worker, setting of a next measurement point, and guidance to the next measurement point are repeated.

A method of maintaining a desired seed population rate during periods of acceleration of the agricultural planter. In one method, if the horizontal acceleration of the planter is greater than a predefined upper threshold, the seed disc is driven at a rotational speed to maintain the desired seed population rate based on a highest stable ground speed. In another method, if the horizontal acceleration is less than a predefined lower acceleration threshold, the seed disc is driven at a rotational speed to maintain the desired seed population rate based on a lowest stable ground speed. In another method, if the horizontal acceleration is less than the predefined upper acceleration threshold and is greater than the predefined lower acceleration threshold, the seed disc is driven at a rotational speed to maintain the desired seed population rate based on an a preferred planter ground speed input.

A pay television satellite broadcast includes validation data that can be used to validate authenticity of live global positioning system (GPS) data. The validation data may be included within entitlement messages and encrypted for security and selective reception by authorized receivers. A navigation system may compute checksums of received live GPS data and compare with the validation data for a match. A decision about whether or not to use the live GPS data may be taken based on whether or not the computed checksums match the validation data received via the pay television satellite broadcast signals.

A pay television satellite broadcast includes validation data that can be used to validate authenticity of live global positioning system (GPS) data. The validation data may be included within entitlement messages and encrypted for security and selective reception by authorized receivers. A navigation system may compute checksums of received live GPS data and compare with the validation data for a match. A decision about whether or not to use the live GPS data may be taken based on whether or not the computed checksums match the validation data received via the pay television satellite broadcast signals.