GPS Distance to Well (m)

gpsDistanceM on a FieldMeasurement is the key spatial verification metric — how far the technician's recorded GPS position is from the well's known location. If gpsDistanceM exceeds a configurable threshold, gpsFlagged is set to true. Data managers review flagged measurements to confirm whether the reading was taken at the correct well or whether it represents an error that requires follow-up with the field crew.