Using an external GNSS device

Follow Avatar Alberto Iaccarino
Updated : Created :
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RD Map+ allows users to use a compatible external high accuracy GNSS receiver with

Bluetooth® wireless connectivity.


Read here if you are setting up a Trimble® Catalyst™ DA2.


NOTE:  You will need an RD Map+ Premium license to use an external GNSS receiver.


External GNSS receiver Connectivity requirement


Your external GNSS receiver must support NMEA 0183 over SPP Bluetooth. If unsure, please refer to the operation manual that came with it.


Setting Up RD Map+ to use an external GNSS receiver


Follow these steps to set RD Map+ to use your external GNSS receiver as your default position source when creating your utility maps. 

From the Position section in the settings menu:


  1. Set your Source
    Select Automatic or External and tap OK


  2. Set External GNSS
    Select Paired devices and tap OK

  3. Pair and select your device

    If you have already paired your device just select it and tap OK

    or tap Pair Device to initiate the pairing process.

NOTE: the external GNSS receiver must be on and in pairing mode


Using external GNSS receiver

If you have followed the steps above you are now ready to start using your external GNSS receiver.

Ensure your external GNSS device is turned on before you start a utility survey.

When you start a utility survey RD Map+ will display the External GNSS status screen 



  1. Tap Continue to start your  utility survey
  2. Tap the GNSS icon to check the GNSS status



Once you are ready start taking survey measurements from your locator to create a utility survey map