DEVICE HAVING TOUCH PANEL, RADAR DEVICE, PLOTTER DEVICE, MARINE NETWORK SYSTEM, SYMBOL IDENTIFICATION METHOD AND SYMBOL IDENTIFICATION PROGRAM

摘要

On a display screen, a touch panel device displays a marine chart and displays a symbol placed in the marine chart, said symbol indicating a weigh point. The touch panel device detects two or more touches on the display screen and the positions of said touches. On the basis of the positions of the detected two or more touches, the touch panel device creates an area, identifies a symbol positioned within the created area, and performs a cut process on said symbol.