Ground Penetrating Radar
(GPR) Services in Auckland
Accurate utility locating using advanced GPR technology
At Precision Site Solutions, we provide high-resolution Ground Penetrating Radar (GPR) services for contractors, engineers, and asset owners who need fast, reliable underground mapping. Whether you’re managing an infrastructure upgrade or a new development, our GPR service reduces the risk of damage to hidden assets, improving safety and avoiding costly delays.
What is GPR and how does it work?
GPR is a non-invasive technology that uses electromagnetic pulses to detect changes in subsurface materials. It can identify both metallic and non-metallic utilities, including:
- Plastic water pipes
- Concrete structures
- Voids and trenches
- Power and telecom conduits
GPR is especially effective in complex or congested environments where traditional EMI (Electromagnetic) locating may fall short.
The importance of combining GPR and EMI
While GPR is powerful on its own, the most accurate results are achieved when used in conjunction with Electromagnetic Induction (EMI) locating. EMI excels at detecting conductive materials like power cables and metal pipes, whereas GPR can identify non-conductive features such as plastic pipes and voids.
Using both methods together provides a more complete and cross-verified picture of the underground environment, reducing the risk of missed assets. This combined approach is particularly valuable in projects requiring a high degree of accuracy, such as early-stage design or infrastructure upgrades.
When to use GPR services
GPR is ideal for:
- Pre-design utility detection for engineers
- Service locating prior to excavation or trenching
- Verifying as-built records
- Assessing existing infrastructure without digging
On-site verification and mark-outs are essential, and early utility locating can change project outcomes.
Why choose Precision Site Solutions?
We combine industry-grade equipment with experienced operators who understand what matters on-site:
High-frequency GPR scanning for enhanced clarity
Experienced surveyors with civil and construction backgrounds
Geo-referenced output (PDF or CAD/DWG)
Quick turnaround and responsive communication
Need accurate GPR locating?
We can help you avoid costly surprises. Call us or contact us to discuss your project requirements.
Frequently Asked Questions
about GPR
What types of services can GPR detect?
GPR can identify metallic and non-metallic assets, including pipes, ducts, voids, and concrete features.
Is GPR safe to use on-site?
Yes. GPR is a non-destructive, non-radiating method that’s safe for operators and the surrounding environment.
How deep can GPR detect?
This depends on the material and soil type, but typical ranges are 1 to 3 metres in urban settings.
Do I still need 811/BeforeUDig if I use GPR?
Yes. GPR complements public utility marking by identifying unknown or private assets not listed in the BeforeUDig records.
Can you provide survey files for designers?
Absolutely. We provide PDF reports or geo-referenced CAD files for easy integration into your design documents.
Do I need both GPR and EMI for my site?
In many cases, yes. While GPR is excellent for detecting a range of underground features, EMI is better at identifying conductive materials. Using both methods together significantly improves accuracy and ensures a more complete picture of underground infrastructure.
Call us today to discuss the options for your next project.
We provide Ground Penetrating Radar services and 3D scanning.