vGIS supports external GNSS and RTK devices for added precision. Using vGIS with a GNSS antenna makes for an effortless experience that requires no calibration and guarantees accurate positioning.
GNSS configuration (before using vGIS)
First, you'll need to install the GNSS app. Each vendor provides its own apps for GNSS management (e.g. Eos Tools, Zeno Connect, Trimble Mobile). For Android devices, you'll need to update the Mock Location to connect to your GNSS. Next, enable your GNSS/RTK device by connecting it to your phone or tablet using Bluetooth or cable and running the required background app (examples of configuration include Eos, Leica, and Trimble).
Configuring GNSS for vGIS
Once connected, launch vGIS AR. From the main menu, verify the hardware provider and make sure the GNSS Power button is ON (Fig 1). Lastly, set the antenna offset and tilt compensation with respect to your device under Options -> GNSS (Fig. 2-3). Note: To the right of the power button in Fig. 1 is the Tilt compensation reset button.
Once configuration is set, the antenna must remain in the defined position throughout the session.
- Green Light - wait until the light in the accuracy bubble turns green.
- Walk - complete the walk calibration by following the AR line drawn on the ground.
- Keep GNSS near device - as you move around the job site, make sure the GNSS antenna stays in the same position relative to your phone, tablet, or HoloLens.
This video tutorial explains vGIS's setup with an external GNSS antenna.