GPS Surveying
For exact positioning of your project
Want to position your construction project perfectly with millimetre accuracy? At CREW-B, we combine advanced GPS surveying with our 3D laser scanning technology for the most reliable measurement results. With our own high-quality GPS survey systems, we place your project at exactly the right coordinates in the Dutch RD system.
GPS surveying ensures that your building or installation connects perfectly to the existing environment. You get certainty about the exact position of all elements, which is essential for smooth execution without surprises on the building site.
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What exactly is GPS surveying?
A GPS survey uses satellite signals to determine the exact position of a point on earth. In the Netherlands, we work with the Rijksdriehoeksstelsel, also known as RD coordinates. This national system ensures that all measurements connect perfectly with each other, regardless of which party carries them out.
At CREW-B, we use RTK-GPS technology, which stands for Real-Time Kinematic. This advanced technique uses correction signals that increase accuracy to within a few millimetres. So you do not just get a measurement, but an extremely precise positioning you can rely on completely.
The combination with our 3D scans makes GPS surveying extra valuable. We position complete point clouds at exactly the right spot, giving you a perfectly positioned digital model of the actual situation.
Benefits of GPS surveying at CREW-B
With GPS surveying from CREW-B, you work more efficiently and accurately. You prevent costly errors because all parties work with the same reliable coordinates. Whether you are an architect or a contractor, you know exactly where everything goes and how it connects to existing structures.
With our approach, you can start your project within a reasonable time. You get directly usable data without extra corrections afterwards. This saves you time, prevents rework and keeps your project on schedule. The millimetre accuracy gives you the confidence that everything fits perfectly, from the first pile to the last detail.
For complex projects where multiple disciplines work together, GPS surveying is indispensable. Everyone works with the same reference points, which prevents miscommunication and eases collaboration. This is especially important for renovations, extensions or projects where you have to connect to existing infrastructure.
100+
Clients
15+
Countries
2050+
Scans
8+
Years active
<5
Days per scan
How does CREW-B work with GPS technology?
Our process starts with placing reference points around your project. We measure these points with our RTK-GPS equipment, making use of the national network of GPS base stations. The correction signals from these stations ensure the highest accuracy.
Next, we link this GPS data to our 3D laser scans. Each scan is positioned exactly on the correct RD coordinates and NAP elevation. The result is a complete BIM model that connects perfectly to reality and is directly usable for your design or execution.
You receive all measurement data in the formats you need. Whether you work with AutoCAD, Revit or other software, our data connects seamlessly with your way of working. What is more, we remain available for support during your project, so you can always count on our expertise.
Accuracy of GPS surveying
The accuracy of a GPS survey depends on various factors, but with our RTK technology we achieve a precision of 1 to 2 centimetres horizontally and 2 to 3 centimetres vertically. This millimetre accuracy is more than sufficient for most construction and installation projects.
GPS can also measure elevation, and very accurately at that. We determine not only the X and Y coordinates, but also the Z value, that is, the height relative to NAP. This is crucial for projects where elevation differences matter, such as sewers, foundations or sloping sites.
Who is GPS surveying suitable for?
Contractors and project managers
Contractors and project managers benefit from the certainty that GPS surveying offers. You can plan accurately, manage efficiently and prevent delays. The exact positioning prevents discussions about deviations and ensures a smooth construction process in which all parties are aligned.
Architects
For architects, GPS surveying means designs fit perfectly with the existing situation. You no longer have to guess or work with margins, but with exact data. This gives you the creative freedom to design with the full confidence that everything is workable.
Facility managers and property managers
Facility managers and property managers use GPS surveying to map complete building portfolios. You get insight into the exact positions of all assets, which is essential for maintenance, renovation and sustainability. With this data, you make well-founded decisions about investments and improvements.
Get started today
Start with GPS surveying for your project today. Contact CREW-B and discover how our millimetre-accurate surveys make your work easier and more certain. In the short term, you will have the exact data in hand for a worry-free project flow.
A GPS survey is a method to determine the exact position of a point on earth using satellite signals. The GPS system calculates your location by receiving signals from at least four satellites and measuring the time difference between transmission and reception. For professional GPS surveying such as CREW-B carries out, we use RTK technology with correction signals for millimetre accuracy. This results in exact RD coordinates that you can use immediately for your construction project or installation.
A standard GPS survey usually has an accuracy of several metres, which is insufficient for construction and infrastructure projects. RTK-GPS (Real-Time Kinematic) uses correction signals via a reference station, which improves accuracy down to the millimetre. At CREW-B, we use RTK-GPS to position scans and models at exactly the right location.
By placing your 3D scan on RD coordinates (Rijksdriehoekscoördinaten), you ensure that it matches exactly with other geographical data, such as cadastral maps, construction drawings and topographical maps. This prevents measurement errors and ensures consistent and correct dimensioning in your project.
GPS surveying depends on satellite signals, which makes it less reliable indoors or in areas with many obstacles, such as tunnels. To still make accurate position determinations, we use our 3D laser scanners. We process the GPS coordinates we capture outside into the scans, so that the location is also accurately determined indoors.
Yes, GPS can measure elevation very accurately. In addition to the horizontal position (X and Y coordinates), GPS also determines the vertical position, the Z coordinate. At CREW-B, we measure elevations relative to NAP (Normaal Amsterdams Peil) with an accuracy of 2 to 3 centimetres. These elevation measurements are essential for projects where fall is important, such as sewers, or where you have to connect to existing elevations. The combination with our 3D laser scanning makes the elevation determination even more accurate.