Technical Specification Overview
| Parameter | Standard Value |
|---|---|
| Primary Geodetic Datum | ETRS89 |
| Legacy/Historical Datum | OSGB36 |
| Local Grid Projection | British National Grid |
| Known Datum Shift (vs WGS84) | 100 - 130 meters |
| National Mapping Authority | Ordnance Survey (OS) |
Professional Compliance Warning
Failure to apply correct transformation parameters when converting from WGS84 (GPS) to ETRS89 creates a systematic 100 - 130 meters offset. In construction and legal surveying, this drift exceeds the allowable error margin for any certified geodetic workflow.
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