Frequently Asked Questions

You must have an internet connection to download models from Trimble Connect, and to obtain high accuracy GNSS. You can operate SiteVision without an internet connection but with the following limitations:

• You must have logged into SiteVision on the device previously.
• To use a model (or models) from Trimble Connect, you must have already downloaded it from Trimble Connect while connected to the internet.
• GNSS positioning may not be as accurate, as you will be operating with the satellite-delivered Trimble RTX correction stream or a local SBAS service. 

The accuracy of Trimble SiteVision is dependent on a number of factors, including the type of Catalyst antenna used, the GNSS environment, the length of line being measured to, the type of device being used, and the camera alignment.

Using the Trimble Catalyst DA2 GNSS receiver

GNSS Accuracy:

In areas with VRS Now coverage, where you use a 3rd party VRS service, or when using an Internet Base Station Service (IBSS), the SiteVision system will typically achieve horizontal and vertical accuracies of 1-2 centimeters.

If you are operating in an area that does not have VRS coverage, the Trimble Corrections Hub will select the RTX service. When using the RTX services the horizontal accuracies will vary by location, but are typically 2–10 cm (1–4 inches) in areas with RTX Fast coverage.  In areas without RTX Fast, these accuracies can be obtained but may take up to 15mins for full convergence. Vertical accuracies will vary when using the RTX services.

LiDAR:

Some supported SiteVision devices include built-in LiDAR sensors, which can be used to capture measurements.  In most outdoor environments the practical range is approximately 5m.  For more accurate operations (<20 cm/8 inches), please see the user guide within the Trimble SiteVision application.

SiteVision Integrated Positioning System (Catalyst DA1)

GNSS Accuracy:

In areas with VRS Now coverage, where you use a 3rd party VRS service, or when using an Internet Base Station Service (IBSS), the SiteVision system will typically achieve horizontal and vertical accuracies of a few centimeters.

If you are operating in an area that does not have VRS coverage, the Trimble Corrections Hub will select the RTX service. When using the RTX services the horizontal accuracies will vary by location, but are typically 10–20 cm (4 – 8 inches) in areas with RTX Fast coverage, after convergence, and 30 cm (12 inches) in areas without RTX Fast. Vertical accuracies will vary when using the RTX services.

EDM:

The EDM unit has a range of up to 100 m (300 ft) depending on the target type surface and lighting conditions, but in most outdoor environments the practical range is approximately 25m. For more accurate operations (<20 cm/8 inches), Trimble recommends a range of 0.5 m to 10 m (1.5ft to 30 ft), or up to 25 m (80 ft) to record features requiring lower accuracy (such as trees). For more information download the SiteVision Datasheet, or see the user guide within the Trimble SiteVision application.

Trimble SiteVision runs on devices that are powered by either: 

• iOS 13 and later (iPhone 6s onwards, or iPad 2017), and that is supported by the Apple ARKit technology
• Android operating system version 9.0 and later, that is supported by the Google AR technology