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To perform GPS surveys using TamoGraph, you need a GPS receiver. TamoGraph supports any GPS receiver as long as it is NMEA-compliant. This includes almost all Bluetooth and USB GPS receivers; such receivers communicate with the computer over a virtual COM port (also referred to as a “serial port”).
Unlike GPS receivers, GPS navigators (which typically have displays) are usually not NMEA-compliant and therefore cannot be used with TamoGraph unless special software is used. You can use Garmin devices; however, you will have to use either Spanner, a freeware utility by Garmin, or GPSGate Client, a commercial utility, to make your Garmin navigator NMEA-compliant.
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