| 摘要 |
A handheld graphic user interface (GUI) personal digital assistant (PDA) computer (Figure 48, item 200) is coupled to a GPS/dGPS receiver module (Figure 49, items 212, 214) which is also compact in size to provide for the collection of data associated with position information. Additional features provided by the stored program (pages 112-275) in the PDA (200) include a nested set of menus (Figures 3-32) for preorganizing data collection, navigational functions to permit a user to navigate to a desired location with audio and visual feedback, mapping capability, overlay generation functions which further organize and display the collective data, etc.
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