Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Corporation of America

Satoko Miyama

Shinya Adachi

Hiroyuki Maeda

Naoki Yamada

Yukio Ichikawa

Takashi Kawasato

Location information transmission apparatus for exchanging information about the on-road location on a digital map, characterized in that apparatus at an information provider comprises a location information converter for converting transmit on-road location information to road shape data including the on-road location consisting of a string of coordinates representing the road shape of a road section having a length that depends on the situation and relative data indicating the on-road location in the road section, and that apparatus at a party receiving the on-road location information comprises a shape matching section for performing shape matching by using the road shape data, identifying the road section on a digital map and identifying the on-road location in the road section by using the relative data. This makes it possible to correctly exchange information about the location on a digital map without defining node numbers or link numbers on a road network.

Method for transmitting location information on a digital map, apparatus for implementing the method, and traffic information provision/reception system

Method for transmitting location information on a digital map, apparatus for implementing the method and traffic information provision/reception system

When transmitting an on-road location on a digital map, an information provider transmits, as on-road location information, string of coordinates information representing the road shape of a road section including the on-road location having a predetermined length, additional information including at least one information item chosen from a group of the attribute information on the road including the road location and detailed information on the nodes in the road section, and relative information indicating the on-road location in the road section. Receiving party receiving this on-road location information performs shape matching to identify the road section on a digital map and uses relative data to identify the on-road location in this road section. The receiving party can identify the road shape with high accuracy even when only a small amount of string of coordinates data is available. This makes it possible to reduce the data transmission amount and identify an on-load location with high accuracy.

Method for locating road shapes using erroneous map data

This invention provides a method of updating registered information when an old digital map is updated to a new digital map. In the method, coordinate series data representing a shape of a road around a registration point on the old map are acquired from a data base of the old map, a positional relationship between a reference point included in the shape of the road and the registration point is obtained, shape matching is carried out on the new map by using the coordinate series data to obtain a shape of a road on the new map corresponding to the shape of the road, and a reference point on the new map corresponding to the reference point is acquired from the shape of the road thus obtained, thereby specifying the registration point on the new map based on a positional relationship with the reference point on the new map.

Method of updating registered information in digital map

Growing community of inventors

Kanagawa, Japan

Satoko Miyama