Interactive table detailing the physical offset in meters when transforming between legacy national datums and global WGS84/ITRF standards.
| Source Datum | Target Datum | Approximate Shift | Severity & Industry Impact | Recommended Tool |
|---|---|---|---|---|
| NAD27 (USA) | NAD83(2011) | 10 - 100+ meters | Catastrophic (Oil &
Gas) Subsurface trespass limit |
NADCON 5 |
| NAD83(1986) / (2011) | WGS84 (ITRF) | 1.0 - 2.0 meters | High Risk
(Construction) Boundary scale & stakeout error |
HTDP / NADCON5 |
| NGVD 29 | NAVD 88 (Vertical) | -0.5 to +1.5 meters | High Risk (FEMA/Flood) Flood insurance compliance failure |
VERTCON 3.0 |
| OSGB36 (UK) | WGS84 | 100 - 120 meters | Catastrophic
(Utility/Civil) Underground asset mislocation |
OSTN15 Grid |
| GDA94 (Australia) | GDA2020 | 1.8 meters | High Risk (Precision
Ag) Autonomous path deviation |
GDA NTv2 Grid |
| Tokyo Datum | JGD2011 | 400+ meters | Massive Offset (Real
Estate) Total legal boundary loss |
GSI jgdtrans / EPSG:6714 |
| DHDN (Germany) | ETRS89 | 100 - 150 meters | Catastrophic (Telecom) Fiber network misalignment |
BETA2007 NTv2 Grid |
| NAD83(CSRS) Canada | WGS84 | ~1.5 meters | High Risk
(Forestry/Mining) Lease boundary operational trespass |
NTV2_0.gsb |
| NZGD49 | NZGD2000 | 200 meters | Catastrophic
(Cadastral) Subdivision plot offset |
LINZ transformation grid |
| ED50 (Europe) | WGS84 | 100 - 150 meters | Catastrophic (Offshore) Platform positioning & rig spacing error |
Country-specific NTv2 |
| SAD69 (South America) | SIRGAS2000 | 60 - 70 meters | Catastrophic
(Mapping) Topographic scale distortion |
ProGriD |
| Amersfoort (NL) | ETRS89 | 100 - 120 meters | Catastrophic
(Waterways) Dike/flood defense risk limits |
RDNAPTRANS |
Using the wrong datum or applying coordinates without grid-to-ground correction can cause 1-400 metre positional errors —a leading cause of surveying negligence claims and contract disputes.
Explore our full suite of coordinate transformation and compliance tools:
Coordinate accuracy varies by device and datum. Do not use these results for legal or construction purposes without checking:
GPS Accuracy Alert
Your phone's GPS can be off by 30 meters. This can cause critical errors in your data.
Check My AccuracyDatum Shift Risk
Using the wrong coordinate system (e.g. WGS84 vs NAD83) creates a permanent 1-meter offset.
Verify My Datum