Cathy O'Connor

@DustypupVI

Photography, birds, music, my two daughters, philanthropy, and very excited owner of a gallery opening in 2014. There is never enough Big Wreck! ♪

Measuring the elevation of a bolt with Trimble high-precision GPS (accurate to within a millimeter).

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694 days ago

Measuring the elevation of a bolt with Trimble high-precision GPS (accurate to within a millimeter).

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