Interactive Datum Shift Verifier
Enter both coordinate pairs to audit whether the spatial shift matches published geodetic models or indicates a datum mismatch.
How the Verifier Works
The Verifier computes the Haversine great-circle distance between your original and claimed-transformed coordinate pairs. It then compares this against the expected shift range for the selected datum transformation pair, and classifies the result:
- Acceptable —Deviation is within the expected tolerance of the transformation method
- Suspicious —Deviation is outside expected range but below catastrophic mismatch tolerance. Manual review recommended.
- Severe Mismatch —Deviation strongly suggests a datum confusion error (e.g., Tokyo treated as JGD2011, GDA94 treated as GDA2020). Transformation is invalid, do not use in production.
Related Tools & Resources
Explore our full suite of coordinate transformation and compliance tools:
The Cumulative Boundary & Engineering Rework Exposure: NAD83 vs WGS84
Because the North American Plate moves ~2cm/year, NAD83(2011) and WGS84(G1762) currently diverge by over 2.2 meters. Using a "standard" GPS WGS84 coordinate for a high-precision NAD83 cadastral staking has triggered Boundary Dispute Geodetic Offset claims for foundational rework and utility misplacement.