GPS Support
 ArcPad also offers integration with an optional GPS or differential global positioning system (DGPS). With an optional GPS attached, ArcPad displays an individual's current position on the map in real time. Position coordinates are instantly available at the touch of a pen on the map.
Supported GPS Receivers
GPS support for basic navigation and GPS data capture is available worldwide with ArcPad to all receivers that support any of the following GPS protocols:
- National Marine Electronics Association (NMEA) 0183
- Trimble Standard Interface Protocol (TSIP)
- DeLorme Earthmate binary protocol
- Rockwell Precision Lightweight GPS Receiver (PLGR) GPS binary protocol
 ArcPad can display the following GPS information:
- GPS mode (two-dimensional, three-dimensional, and DGPS)
- Speed Over Ground
- Course Over Ground
- Constellation
- Signal quality
- Position, altitude, and compass
- Differential (on/off)
ArcPad includes a debug window for displaying messages received from the GPS and a message option to send messages to the GPS.
GPS Data Capture
 All GPS data can be recorded as a "track log" (stored as a point shapefile) or as points (often referred to as waypoints), polygons, and polylines in a shapefile. The GPS information can be stored as attributes within the shapefile.
ArcPad supports the following data capture options with a GPS receiver:
- Support for point mode digitizing (i.e., the ability to capture explicit points) as well as stream mode digitizing
- Support for position averaging when capturing a point feature or a vertex for a polyline or polygon feature
- Ability to pause the capturing of GPS line or polygon features and resume capturing at a later stage
- Option to set the maximum thresholds for error measurements such as position dilution of precision and estimated position error
- Option to activate an alarm when the GPS mode changes (two-dimensional, three-dimensional, and differential GPS) and automatically stop GPS data capture
- Ability to specify minimum time intervals between GPS positions used for data capture of vertices
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