Digital map data processor and method for processing digital map data

Abstract

A method and apparatus for processing digital map data, which is useful in making accurate road maps and can be used for navigation and control of vehicles based on such road maps. A map image processing station (16) includes an image processor (20) that receives photographic data of geographical profiles through a station (14) for communication with a satellite and converts the received photographic data into orthographic data equivalent to images viewed perpendicularly without distortion. A skeleton map (road network data) including information about roads and their associated 3-dimensional data is extracted from the orthographic data by a data extractor (22). The skeleton map is processed by a data converter (24) to provide basic road data, and desired attribute data are combined by a mapper (28) to provide precise digital orthographic map data with less distortion. The resulting data are distributed from a transmitter (30) to vehicles (18) for use in navigation and vehicle control.

Description

technical field [0001] The present invention relates to a digital map data processor and a digital map data processing method, and more particularly to a processor and a processing method for digital map data generated from ground photographic data. Background technique [0002] Recently, navigation systems have become increasingly popular, using Global Positioning System (GPS) satellite signals to indicate the location of a vehicle on which the system is installed, providing a route to a destination. Also proposed is a Dynamic Route Guidance System (DRGS), which utilizes VICS (Vehicle Information Communication System) to obtain traffic information such as line travel time from an information center, and retrieves a route based on the traffic information obtained in order to reach the route in the shortest time. A driving route recommended for a destination, and the user (driver or similar) is provided with this route. The user of such a system recognizes the driving route ...

AI Technical Summary

Problems solved by technology

Therefore, there is a disadvantage: conventional navigation functions cannot be realized, and these functions include very complicated route calculation (such as toll road priority retrieval, cost priority retrieval, etc.), route guidance (avoiding traffic congestion, avoiding traffic control, etc.), warning control ( Curve warning, uphill or downhill slope warning, etc.), etc.

[0008] Therefore, there is a problem that when various information is combined, the total map accuracy decreases and cannot be accurately calculated by the above-mentioned navigation function

There is also a disadvantage: the position shown on the photo moves away from the position of the vehicle in question identified by GPS, and the navigation itself becomes meaningless

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