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Coordinate Compliance Audit Checklist
Inaccurate coordinate data is a legal liability. Use this audit checklist to verify compliance before project delivery.
How to Use
Run this checklist before every major data delivery or milestone.
Online Tool
Use Cases
- Pre-delivery QA/QC for engineering datasets.
- Vendor data verification for government contracts.
When Professional Consultation Is Recommended
For scenarios where self-check tools cannot mitigate risk, certified professional consultation is mandatory:
- Critical infrastructure projects where datum mismatch exceeds 1cm.
- Datasets involving trans-boundary legal boundaries or sovereign waters.
- Situations where discrepancies exist between historical paper surveys and GNSS data.
See the Decision Boundary Guide for detailed risk thresholds.
FAQ
Q: Why is coordinate compliance necessary?
A: Non-compliant data causes integration failures and legal disputes. An audit trail proves due diligence.
Q: What standards does this cover?
A: It aligns with ISO 19111 (Referencing by Coordinates) and general OGC best practices.
Q: How often should I audit?
A: At project kickoff, creating new datasets, and final delivery.
Professional Verification Disclaimer
This content is provided for decision-support and educational purposes for geospatial professionals and does not constitute legal, surveying, or engineering advice. Regulations and official standards vary by jurisdiction and project scope. Information is based on publicly available standards as of January 11, 2026. For critical projects, always verify current requirements with:
- Licensed Professional Surveyors or Professional Engineers (PE) in the relevant jurisdiction
- Certified attorneys for legal interpretation of regulations
- Current guidelines from relevant authorities (FAA, JCAB, GSI, etc.)
Reference: Professional Use & Scope
Related Coordinate Conversion Tools
US State Plane (SPCS) Converters & Local Guides
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Certified Geodetic Insight
Verified against professional geodetic standards
The $50,000 Geodetic Drift Liability: 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 $50,000 Professional Liability claims for foundational rework and utility misplacement.
Risk Exposure Metric:
2.2-Meter Tectonic Drift & Epoch Accumulation
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Warning: Verify Your Calculation
Coordinate accuracy varies by device and datum. Do not use these results for legal or construction purposes without checking:
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Your phone's GPS can be off by 30 meters. This can cause critical errors in your data.
Check My Accuracy →Datum Shift Risk
Using the wrong coordinate system (e.g. WGS84 vs NAD83) creates a permanent 1-meter offset.
Verify My Datum →