GPS terminal, position measuring system, and map display method using the same

A GPS terminal comprising reception means, equipped with a GPS capable of network communication, for receiving radio signals transmitted from a plurality of artificial satellites, communication means for receiving latitude/longitude data of a current position by network communication with a base station, control means for recognizing the latitude/longitude data of the current position on the basis of the radio signals received by said reception means and the latitude/longitude data received by said communication means, and display means for displaying a map centered on the latitude/longitude data recognized by said control means,

• wherein said reception means measures reception sensitivity with respect to the radio signals transmitted from the plurality of artificial satellites, and
• said control means automatically changes a scale of the map displayed by said display means on the basis of the measurement result on the reception sensitivity in said reception means with respect to the radio signals.

A position measuring system comprising a base station which is equipped with a GPS capable of network communication and receives radio signals transmitted from a plurality of artificial satellites, and a GPS terminal which is equipped with a GPS capable of network communication, receives radio signals transmitted from the plurality of artificial satellites, recognizes latitude/longitude data of a current position by performing network communication with said base station, and displays a map centered on the latitude/longitude data,

• wherein said GPS terminal measures reception sensitivity with respect to the radio signals transmitted from the plurality of artificial satellites, and automatically changes a scale of the displayed map on the basis of the measurement result.

A position measuring system comprising a base station which is equipped with a GPS capable of network communication and receives radio signals transmitted from a plurality of artificial satellites, and a GPS terminal which is equipped with a GPS capable of network communication, receives radio signals transmitted from the plurality of artificial satellites, recognizes latitude/longitude data of a current position by performing network communication with said base station, and displays a map centered on the latitude/longitude data,

• wherein said base station measures reception sensitivity in said GPS terminal with respect to the radio signals transmitted from the plurality of artificial satellites, and transmits the measurement result to said GPS terminal, and
• said GPS terminal automatically changes a scale of the displayed map on the basis of the measurement result on the reception sensitivity in said GPS terminal with respect to the radio signals, which is transmitted from said base station.