Abstract: A route data compression method to compress the recording points of a line of a route planning data by means of setting the values of predetermined distance, predetermined angle and predetermined number of compression points and then determining whether or not the distance between every two recording points is greater than the predetermined distance and whether or not the contained angle of the two link lines of every three recording points is greater than the predetermined angle. After determination of all recording points, the recording points are compressed. If the number of points after compression is greater than the predetermined number of compression points, increase the value of the predetermined distance, and then repeat the determination procedure. When the number of points after compression becomes smaller than the predetermined number of compression points, the compression is done.

Abstract: A route data compression method to compress the recording points of a line of a route planning data by means of setting the values of predetermined distance, predetermined angle and predetermined number of compression points and then determining whether or not the distance between every two recording points is greater than the predetermined distance and whether or not the contained angle of the two link lines of every three recording points is greater than the predetermined angle. After determination of all recording points, the recording points are compressed. If the number of points after compression is greater than the predetermined number of compression points, increase the value of the predetermined distance, and then repeat the determination procedure. When the number of points after compression becomes smaller than the predetermined number of compression points, the compression is done.

Abstract: A route planning method used with an electronic device formed of a processor, a transmission interface, an I/O port and a storage unit and a GPS formed of a CPU, a transmission interface, a storage unit, a display unit, a satellite positioning unit and an antenna is disclosed to input the location data of the predetermined destination into the electronic device through the input/output port of the electronic device so that the processor of the electronic device produces and compresses a route planning data and then transmits the route planning data to the GPS for enabling the GPS to convert the geographic coordinate data of the current location received from the satellite and the compressed route panning data received from the electronic device into a planar or 3D navigation map for display on the display unit thereof.

Abstract: A GPS remote transmission method in which satellite positioning data received by a GPS is converted into a speech signal and transmitted to a proximal mobile telephone wirelessly for enabling the proximal mobile telephone to transmit the speech signal to a proximal base station, which transmits the speech signal to a distal base station through an exchange system so that the distal base station transmits the speech signal to a distal mobile telephone for transmission to a distal GPS, which converts the speech signal into satellite position data for display on a display screen thereof.

Abstract: A water-proof watch case and a method for manufacturing the same are disclosed. First, a design of a case and a bottom lid is decided, and a mold according to the design is fabricated accordingly. Next, a hard plastic material is injected into the mold to form the case and the bottom lid. Next, a soft plastic material is injected at an outer rim of the case to form at least one button, and a soft plastic material is injected at a conjunction between the case and the bottom lid to form a water-proof gasket. Finally, the hard and soft plastic materials are heated to adhere the button and the water-proof gasket to the outer rim of the case and the conjunction between the bottom lid and the case respectively.

Abstract: A GPS system comprising a GPS receiver for receiving and processing a GPS signal is provided. The traffic information receiver is adapted for receiving traffic information signal and a storage device for storing the GPS signal and the traffic information signal. The GPS receiver comprises a wireless receiver and a processor. The wireless receiver is adapted for receiving the GPS signal. The processor is adapted for controlling the wireless receiver and rotationally storing the GPS signal and the traffic information signal at a predetermined time period, and then transmitting the stored GPS signal and traffic information signal, in order, to the storage device, wherein the information corresponding to the GPS signal and the traffic information signal are transmitted according to a specific time or frequency setup by the processor.