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Nautical chart display device, nautical chart display method, and nautical chart display program
Nautical chart display device, nautical chart display method, and nautical chart display program
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机译：航海图表显示设备，航海图表显示方法和航海图表显示程序
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摘要
The purpose is to provide a nautical chart display device which enables a measurement of a distance in a method easily understandable even for a user who is not used to a measurement of a distance by a touch operation. The nautical chart display device 20 includes a display unit 21, a touch operation identifying module 52, a tool identifying module 53, and a tool displaying module 54. The display unit 21 displays a nautical chart on a screen. The touch operation identifying module 52 identifies a touch operation to the screen. The tool identifying module 53 identifies a position and an orientation of a ruler placed on the screen. The tool displaying module 54 displays distance markers according to a scale of the nautical chart on the screen at the position where the ruler is placed, based on the position and the orientation identified by the tool identifying module 53.
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