Category Archives: Surveying

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Surveying Statistics

This entry is part 6 of 6 in the series xyHt in print, July 2015The t Distribution, Part 1 In my previous article I discuss the normal distribution and how its properties can be used to isolate blunders in observations. Recall that the normal distribution is based on an infinite number of observations. However, in...

GPS-controlled robots can measure a site fully automatically and precisely anchor screws for the foundation of a solar plant.

Robots

This entry is part 4 of 6 in the series xyHt in print, July 2015Above: GPS-controlled robots can measure a site fully automatically and precisely anchor screws for the foundation of a solar plant. Measuring and Anchoring As a child I used to watch a program on BBC television called Tomorrow’s World. Once in 1981, I...

Left: A hiker stands above the clouds at the Appalachian Trail’s northern terminus: the summit of Katahdin in Baxter State Park, Maine. Courtesy of Jeffrey Stylos.

Mapping the Appalachian Trail, Part 2

This entry is part 2 of 6 in the series xyHt in print, July 2015How the AT was brought into GIS via a collaboration among ATC staff, NSP professionals, and dedicated volunteers. Part 1 of this article (May 2015) reveals the history of the trail, particularly how the land that comprises it was surveyed. Read...

URC Ventures CEO David Boardman demonstrates a stockpile geometry capture. The ~3,000-cubic-yard pile was imaged in ~three minutes, using only his iPhone and two safety cones placed 25 feet apart to establish scale.

Stockpile Reports

This entry is part 1 of 6 in the series xyHt in print, July 2015How to do enterprise inventory management from image-based 3D reconstruction, in the cloud and in your pocket. “No one wakes up in the morning thinking that they need to buy a point cloud,” says URC Ventures CEO David Boardman. “Most people...

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Summertime, and the Surveying Ain’t Easy

This entry is part of 6 in the series xyHt in print, June 2015Now that winter and even spring have finished thrashing half the country, we can officially enjoy summer. As a laser scanner operator I have a fairly easy job this season due to the limitations of the instrument—at least, it’s easier than being...

normal distribution

Surveying Statistics

This entry is part 1 of 6 in the series xyHt in print, June 2015Part 2: The Normal Distribution Part 1 of this series appeared in the May 2015 issue. Errors in observations can be classified as systematic or random. Systematic errors follow physical laws and can be mathematically corrected or removed by following proper...