xyHt in print May 2015 Archives

Mapping the Appalachian Trail

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This entry is part 1 of 9 in the series xyHt in print May 2015

This entry is part 1 of 9 in the series xyHt in print May 2015How the AT was created and surveyed, from Avery’s wheel to GPS The Appalachian Trail (AT) is very old, very long, and iconic. Completed in 1937, it stretches 2,189 miles through 14 states, 88 counties, 168 townships, eight national forests, six […]

EagleView

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This entry is part 2 of 9 in the series xyHt in print May 2015

This entry is part 2 of 9 in the series xyHt in print May 2015The practical side of on-demand aerial image analytics, with an interview of CEO and president Chris Barrow. A contractor showed up at my house to give an estimate for a long overdue roof replacement. He hadn’t pulled out a ladder, so […]

Robots to the Rescue

This entry is part 3 of 9 in the series xyHt in print May 2015

This entry is part 3 of 9 in the series xyHt in print May 2015Above: A representative from The German Federal Agency for Technical Relief operates a UAV. The potential for unmanned vehicles conducting search and rescue is proven in Southeastern Europe. Editor’s note: In our January issue we highlighted ways unmanned aerial vehicles are being […]

Proving Ancient Measurement Methods

This entry is part 4 of 9 in the series xyHt in print May 2015

This entry is part 4 of 9 in the series xyHt in print May 2015Surveying students calculate the Earth’s circumference by following Eratosthene’s method, with help from modern sources. As part of the Geodetic and Control Surveys class at Dunwoody College of Technology in Minneapolis, Minnesota, we have been studying the history of Eratosthenes and […]

The Beaten Path

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This entry is part 5 of 9 in the series xyHt in print May 2015

This entry is part 5 of 9 in the series xyHt in print May 2015Art of Retracement With a set of eyes that had focused on survey lines through several eras, the Old Man (Glenny Dale, also known as Glutton), took one look at the cluster of three monuments along a right-of-way fence line. The […]

I Don’t Need No Stinkin’ Statistics

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This entry is part 6 of 9 in the series xyHt in print May 2015

This entry is part 6 of 9 in the series xyHt in print May 2015Surveying Statistics, Part 1 Do you perform GNSS surveys? Do you use OPUS or perform RTK surveys simply because you don’t understand your software’s output? Do you always use the compass-rule adjustment for traverse data simply because that’s the way you […]