| 摘要 |
PROBLEM TO BE SOLVED: To display and print a map at a substation with a command of the head office of a firehouse in a short time at any time. SOLUTION: A command transmission device 11 and a command reception device 12 are provided with map databases 16 and 24 respectively. When the data amount of the difference between the data amount of a map of the command transmission device 11 and the data amount of a map of the command reception device 12 is larger than a specific value, the old map is displayed and printed first and then the old map data are updated with the map data of the difference. When the map data of the difference is smaller than the specific value or when there is no difference, the old map data are updated with the map data of the difference first and then the latest map is displayed and printed. |
