Category Archives: Surveying

Kirk Norton, NPS land surveyor for the AT, sets up a foresight in Pennsylvania with help from members of the Potomac Appalachian Trail club on the hill above him. Credit: Nicole Wooten.

Mapping the Appalachian Trail

This entry is part 1 of 2 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...

Warren Ward places a prism on an old pin.

The Right Right

This entry is part 3 of 8 in the series xyHt in print April 2015Igor Kidinsky thought about another career for a fleeting moment. His cold fingers struggled to fine-tune the total station. As an Afghanistan war veteran, he sometimes dreamt of spending his life closer to a beach rather than continue freezing in the...

This Google Earth view of Wilkes-Barre, Pennsylvania, shows marks for the corners and standard parallels for the low-distortion projection.

Transformation of Observations, Part 4

This entry is part of 8 in the series xyHt in print April 2015Single Project Factor Here concludes a four-part series of articles about transformation of observations, spanning from September and December 2014 to March 2015. Part 1 covers how to transform surface observations into a geocentric coordinate system so that they can be compared...

RFID tags take many forms. The inside of a tag shown above— designed to attach to metal infrastructure in harsh environments, such as water pipes and valves—has a thin copper “bow-tie” antenna with a minuscule chip in the middle. It’s shown contrasted with a grain of rice.

RFID

This entry is part 5 of 8 in the series xyHt in print April 2015Above: RFID tags take many forms. The inside of a tag shown above—designed to attach to metal infrastructure in harsh environments, such as water pipes and valves—has a thin copper “bow-tie” antenna with a minuscule chip in the middle. It’s shown...

The R1 is a small Bluetooth peripheral GNSS receiver that is purpose-designed for mapping-grade uses.

Mapping Peripheral

This entry is part 7 of 8 in the series xyHt in print April 2015A review of Trimble’s R1, a GNSS Bluetooth peripheral for mobile devices, with multiple options for correction sources. The idea of a GNSS “puck” has broad appeal: a peripheral GNSS receiver to precision-enable mobile devices such as smart phones, tablets, and...

John Heiser, a senior environmental research engineer at Brookhaven National Laboratory (BNL) collects solar data at the Long Island Solar Farm—a 200-acre, 32 MW facility located on the BNL campus.

Maximizing the Sun

This entry is part 8 of 8 in the series xyHt in print April 2015Solar energy grows in part due to aerial imaging and surveying. Solar power is booming in the United States. “Every three weeks,” President Obama said in his 2015 State of the Union address, “we bring online as much solar power as...