| 摘要 |
A distance measuring system for use on a golf course is provided that utilizes a portable unit for use by each golfer, and a single base unit. The system provides accurate position and distance information between each portable unit and various course features such as pins and greens, water traps, sand traps, and the like. The base unit and each portable unit utilize the Global Positioning System to determine their local positions. The base unit uses its known position and the known positions of the various course features, with the position from the portable unit to calculate accurate relative distances between the portable unit and the known course features. Position and distance information is communicated between the base unit and the portable units by radio link, along with other desired information. The distances and other information can be displayed at the portable unit. The other transmitted information can include messages to all or specific golfers, such as weather, wind, or emergency information, and requests from the golfers to the base unit, such as refreshment orders, emergency situations, course damage, and the like. The portable units can be hand-held and provide keypad data entry for distance and other requests, and a display.
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