Internal GPS Is Inaccurate. Does This Mean I Need To Buy External GNSS For vGIS To Work? (KB-FQ003)

No. vGIS has two calibration methods: 

1. vGIS Calibration: Achieves 5cm/2in accuracy when configured correctly.
2. External GNSS/RTK-supported calibration: Up to 1cm horizontal accuracy. Both have their own advantages and use cases. Most of our clients—over 95% of users—use vGIS as is without additional GNSS hardware, which helps them minimize or completely eliminate hardware costs.

To read more about both calibration methods, click here.

Have Questions? Feel free to Submit A Request to speak with a member of the vGIS Support Team.

Reviewed:  2025-05-29