Smartphone GPS Accuracy
Most modern smartphones are more accurate than you think. Here’s what to expect when navigating to your boundary points.
How Accurate Is Your Phone?
Most smartphones sold since 2020 carry dual-frequency GPS chips (L1 + L5), delivering 1–3 metre accuracy out of the box — close enough to identify your boundary fence, hedge, wall, or marker on the ground.
Your Smartphone GPS: 1–3 Metre Accuracy
1–3 metres with dual-frequency (L1 + L5)
Modern phones use two GPS frequencies simultaneously. The second frequency (L5) corrects for atmospheric distortion, dramatically improving accuracy — especially in built-up areas. This is standard on virtually all mid-range and premium phones today.
Supported phones: iPhone 12 and later • Samsung Galaxy S21 and later • Google Pixel 6 and later • Most mid-range Android phones from 2022 onwards.
Still on an older or budget phone? Single-frequency (L1 only) devices typically achieve 3–10 metre accuracy — still useful for finding boundary features, though you may need to scan a slightly wider area around each point.
Boost Your Accuracy Before You Go Outside
Your phone combines GPS satellites with other signals to pinpoint your location. Turn these on before walking your boundary for the best results:
- Bluetooth — helps your phone detect nearby Bluetooth beacons for location refinement. Leave it on.
- Wi-Fi — even if you’re not connected to a network, your phone scans nearby Wi-Fi access points and uses their known positions to improve accuracy. Keep Wi-Fi on.
- Mobile data — enables A-GPS (Assisted GPS), which downloads satellite positions from the network so your phone gets a GPS fix faster and more accurately.
- High-accuracy / Precise Location mode — on Android: Settings → Location → “High accuracy”. On iPhone: Settings → Privacy → Location Services → enable “Precise Location” for your browser.
In short: turn everything on. Bluetooth, Wi-Fi, mobile data, and GPS all work together. The more signals your phone has, the more accurate your position.
1–3 m
is all you need to find your boundary fence, peg, or marker
Over 60–70% of smartphone users already carry a dual-frequency GPS phone. With average upgrade cycles of 2–3 years, this number is growing rapidly. Your phone is almost certainly accurate enough.
Your Boundary Coordinates Are Extremely Accurate
The GPS coordinates in your BoundaryFinder report are derived from LINZ (Land Information New Zealand) cadastral parcel data. These coordinates are far more precise than any consumer GPS device — they represent the official registered boundary position to sub-metre accuracy.
The only variable is your phone’s ability to navigate to those coordinates. With a modern dual-frequency smartphone in good conditions, you can expect to get within 1–3 metres of each boundary corner — close enough to identify a fence line, hedge, wall, or physical boundary marker.
About the Coordinates
LINZ cadastral data defines the legal boundary of each title as captured in the survey records. Our coordinates reflect this registered position. If you need a precise legal survey of your boundary, you will need to engage a licensed cadastral surveyor.
Tips for Best GPS Accuracy
- Clear sky view — stand in the open, away from tall buildings, dense tree cover, and overhead structures. GPS signals come from satellites and need a clear line of sight.
- Hold your phone flat at waist height — keep the screen facing up with a clear view of the sky. Your phone’s GPS antenna sits behind the screen, so holding it flat gives it the best line of sight to satellites overhead. Walk slowly and steadily — quick movements reduce accuracy.
- Stand still for 20 seconds — let your phone acquire multiple satellite signals and average out the position. The first reading is usually the least accurate. In our testing, a Samsung Galaxy smartphone achieved 1.5 metre accuracy when held flat and kept still for just 20 seconds.
- Enable high-accuracy mode — on Android, go to Settings → Location → set to “High accuracy” (uses GPS, Wi-Fi, and mobile networks). On iPhone, ensure Location Services is on and set to “Precise Location” for your browser.
- Check your accuracy reading — our navigation panel shows your GPS accuracy in real time. If it reads “±3m” you can trust the direction and distance. If it reads “±15m” or more, wait for it to improve before walking.
- Use your phone’s compass — our compass bearing feature works best if you calibrate your phone’s compass first: move your phone in a figure-of-eight pattern a few times.
- Boundary pegs are often buried — iron or concrete pegs may be 50–100 mm below the surface. A metal detector can help locate them once you’re within a few metres.
Want Sub-Metre Accuracy?
If your phone’s 1–3 metre accuracy isn’t quite enough — for example, to pinpoint a buried boundary peg — affordable external GNSS receivers can pair with your phone via Bluetooth and deliver sub-metre accuracy.
We’ve put together a guide to budget GNSS devices starting from around NZ$180, available on Amazon Australia and AliExpress, that work with BoundaryFinder right out of the box.
Browse Budget GNSS Receivers →For most customers, a modern smartphone is all you need. Our boundary coordinates are extremely accurate — your phone just needs to get you close enough to see the fence, peg, or marker on the ground. If you’re within 2–3 metres, you’re at the right spot.
Find Your Boundary →