GNSS Surveys

Accurate positioning underpins every survey we carry out, and GNSS technology is one of the core methods used to achieve it. By using satellite-based positioning equipment, our surveyors can capture precise coordinates and levels across a site quickly and reliably, even over large or open areas where traditional methods would take significantly longer. GNSS surveying supports a wide range of projects, from topographical surveys to setting out and boundary verification.

How GNSS Surveys Work

GNSS equipment uses signals from multiple satellite networks to determine precise horizontal and vertical positioning on site, typically achieving centimetre-level accuracy when used with RTK (Real-Time Kinematic) correction. This makes it particularly effective for large open sites, rural land, and projects where speed and coverage matter alongside precision, complementing more localised survey methods where needed.

Where GNSS Fits into Wider Survey Work

GNSS positioning is rarely used in isolation — it’s most often combined with topographical surveys to establish accurate site levels and boundaries, or used alongside other equipment such as total stations on sites with limited satellite visibility, such as those with heavy tree cover or tall buildings. With more than 3 decades of surveying experience, SSIP and ISO accredited processes, and Safe Contractor, CHAS, and Constructionline approved working methods, we use GNSS technology to deliver accurate results at competitive rates on projects nationwide.

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GNSS SURVEY FAQ’S

A GNSS survey uses satellite-based positioning equipment to capture accurate coordinates and levels across a site, providing precise data for a range of surveying and setting out applications.

When used with RTK correction, GNSS equipment typically achieves centimetre-level accuracy, making it suitable for projects where both precision and speed of data capture are important.

GNSS is particularly effective on large, open, or rural sites where covering ground quickly with reliable accuracy is a priority, compared to more time-intensive traditional methods.

GNSS accuracy can be affected by obstructions such as tree cover or tall buildings, so on these sites we combine GNSS with other equipment, such as total stations, to maintain accuracy.

Yes. GNSS positioning is commonly used to establish accurate site levels and boundaries as part of a wider topographical survey.

Yes. Accurate GNSS positioning is well suited to setting out work, helping ensure structures and features are placed correctly on site in line with design drawings.

We select the most appropriate method for each site, and GNSS is used where it offers the best combination of accuracy and efficiency, often alongside other surveying techniques.

Have Any Questions?

If you have any questions regarding our services feel free to contact the Subvision team.