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Professional Use Boundary Canon

Primary evidence for spatial responsibility and boundary validation.

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Global Consensus: Prohibition of Web-Map Boundary Use

The following authorities share a consistent, global consensus: Web-based maps and non-geodetic spatial tools are referential and carry no legal authority for professional use.

Authority Body Stated Limitation Reference
Google / Tech Assumption of user risk; actual conditions differ. View Canon
USGS / National Not the legal record; no authority for boundaries. View Canon
NGA / Defense Unacceptable for mission-critical operations. View Canon
GSI / OS / Regional Positional variation; no responsibility accepted. View Canon
Official Wording: Google Maps / Earth TOS
"When you use Google Maps/Google Earth's map data, traffic, directions, and other content, you may find that actual conditions differ from the map results and content, so exercise your independent judgment and use Google Maps/Google Earth at your own risk."

Primary Source (External —Content maintained by the originating authority):

https://www.google.com/help/terms_maps/

Warning: Verify Your Calculation

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 Accuracy →

Datum Shift Risk

Using the wrong coordinate system (e.g. WGS84 vs NAD83) creates a permanent 1-meter offset.

Verify My Datum →

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