Patent ID: 8855927
Filing Date: 2014-10-07
Classification: G01C,G09B

Abstract:
1. A method for a two-way radio system to make an electronic map enabling each two-way radio to independently perform a function of Global Positioning System (GPS) positioning and display under a condition of no GPS electronic map provided, comprising steps of: a. providing a console to control a computer to scan or download a non GPS standard map designated as a map template from a paper map, an aerial photograph, an engineering or a military map, the map template being temporarily stored in the computer; b. receiving GPS location information of at least two reference points of known locations through the computer and storing the GPS location information in the computer, the known locations of the at least two reference points being within a range of the map template; c. executing a map editing program built in the computer to overlappingly display the map template and coordinate points generated according to the GPS location information of the at least two reference points on a screen of the computer, controlling the computer to change a scale and angle of the map template in order to overlap the known locations of the at least two reference points on the map template with the coordinate points, and then editing the map template with the coordinate points to create one or multiple map drawing files as electronic maps in accordance with a GPS standard to be stored in a map database; d. actively or passively retrieving one or multiple of the map drawing files from the map database by the console, then transmitting the one or multiple map drawing files being retrieved through a radio frequency (RF) repeater to one or multiple two-way radios in a group over an existing RF channel, and storing the one or multiple map drawing files in a memory device of the one or multiple two-way radios; and e. obtaining one of the map drawing files as desired from the memory device of the two-way radio, and displaying the map drawing file being obtained on a liquid crystal display (LCD) screen of the two-way radio, and then executing a positioning and displaying program built in the two-way radio, enabling each of the two-way radio to independently perform a function of group positioning and displaying, wherein the function of group positioning and displaying includes position tracking, inquiry, recording and deleting; wherein the step of executing the map editing program built in the computer further comprises: c1. moving the map template to allow the known location of a first reference point of the map template to be overlappingly displayed with a coordinate point generated according to GPS location information of the first reference point on the computer screen; c2. confirming and locking the location of the first reference point on the map; c3. adjusting a scale and angle of the map template to allow coordinate points generated according to other reference points to be correspondingly positioned on the known locations of the other reference points of the map template; and c4. confirming and locking the scale and angle of the map template in order to create and store the one or multiple map drawing files in the map database.