Point of interest database maintenance system

Abstract

A method of processing data at a server (302) for maintenance of a database (516) of points of interest, such as speed limit enforcement devices. Each of the devices represented in the database has at least one attribute and a confidence value indicative of the accuracy of the at least one attribute associated therewith. The confidence value is time dependent and varies according to a pre-defined decay function. A report (500) relating to an attribute of a speed limit enforcement device is received at the server (302) from a mobile device (200). The confidence value associated with the speed limit enforcement device is adjusted in accordance with the received report, and information relating to the speed limit enforcement device (520, 522) is selectively transmitted to the or another mobile device (200) based on the confidence value.

Description

FIELD OF INVENTION [0001]The present invention, at least in some aspects, relates to methods and systems of processing data for maintenance of a database of points of interest, such as speed limit enforcement devices. Other aspects of the invention relate to the maintenance of similar data that is temporary or dynamical in nature, such as the availability of parking spaces or the availability and status of electric vehicle charging stations.BACKGROUND TO THE INVENTION [0002]Portable navigation devices (PNDs) that include GNSS (Global Navigation Satellite Systems) signal reception and processing functionality are well known and are widely employed as in-car or other vehicle navigation systems. Such devices include a GNSS antenna, such as a GPS antenna, by means of which satellite-broadcast signals, including location data, can be received and subsequently processed to determine a current location of the device. The device may also include electronic gyroscopes and accelerometers whic...

AI Technical Summary

Benefits of technology

The present invention provides a method of fusing data from various sources while using trustworthiness measures for each piece of data. This helps to increase the accuracy and freshness of the data. The invention also allows for real-time adjustments to the trustworthiness measures based on user reports, reducing false positive warnings to drivers. Additionally, the invention can use information about speed limit enforcement devices to request feedback from users and dynamically display relevant information based on user votes. Overall, the invention enhances the accuracy and usefulness of data fusion in navigation systems.

Problems solved by technology

For example, it is undesirable to provide a warning to a user of a speed camera that is no longer present on the stretch of road, or to incorrectly indicate the speed limit on a stretch road associated with a speed camera in the database.

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