Random conversation in Matt McGrath’s office a couple years ago after reading Nick Chrisman’s book we all knew

Gilbert Hobrough develops the first successful Stereo Image Correlator – a key event in the development of digital photogrammetry

• Gilbert Hobrough develops the first successful Stereo Image Correlator – a key event in the development of digital photogrammetry

• Hobrough had 47 patents in many areas:

• Phonograph turntable and tonearm
• High-fidelity speaker design
• Radar and barometric altimetry
• 3D vision
• Laser interferometry

Bruce Heezen and Marie Tharp (Columbia) published the first physiographic map of the North Atlantic

• Bruce Heezen and Marie Tharp (Columbia) published the first physiographic map of the North Atlantic

• Heezen collected the data, Tharp drew the maps
• They discovered the 40,000-mile underwater ridge girdling the globe
• Their mapping of the Mid-Oceanic Ridge helped pave the way for general acceptance of the alternative theories of plate tectonics and continental drift