Text/HTML
Login
Menu
Collections
About
Submit
FAQs
Search Open/Close
Open/Close Header Details
Search
other
Menu Open/Close
Coast-Geodetic-Survey
Other
Historic Geodesy
Making near contact on low bench over a traverse station. Invar tapes pulled tomaintain a constant tension were used to measure distances in the days beforeelectronic distance measuring devices.
Download
.jpg
(1011.53 KB)
Contact platforms were under water because of heavy rains during traverse survey using invar tapes. Along the Florida West Coast in 1928.
Download
.jpg
(1.5 MB)
George B. Lesley using Geodimeter Model 2A for measuring distance bymercury vapor light over long distances. Pappy Shelton, chief of the geodimeter party, is on the radio.
Download
.jpg
(6.19 MB)
Pappy Shelton, chief of the first geodimeter party, using Model 2A geodimeter.This instrument used a mercury vapor light source.
Download
.jpg
(2.42 MB)
Mechanized leveling before the automobile. Using a railroad velocipede totransport a level instrument as well as serve as the stand.
Download
.jpg
(1.91 MB)
Second-order leveling observing unit working in Virginia in 1935.
Download
.jpg
(1.34 MB)
A Bamberg astronomic theodolite used to determine astronomic latitude andlongitude as well as determine gravitational deflection from the vertical.
Download
.jpg
(2.34 MB)
Operating the Coast and Geodetic Survey historic copper plate printing press.
Download
.jpg
(3.75 MB)
Newspaper article detailing work of the Coast and Geodetic Survey on theSalmon River, or as it is known, the River of No Return.
Download
.jpg
(9.38 MB)
Letter from Carl Risvold to his sister-in-law during Salmon River Project, theRiver of No Return. Letter details communication and mail problems for remotegeodetic work even in 1945.
Download
.jpg
(3.18 MB)
Sophie Risvold with daughter Diane, holding down the homefront while FloydRisvold worked on the Salmon River.
Download
.jpg
(1.85 MB)
Letter from Floyd Risvold to his parents detailing the end of work on the SalmonRiver Project and some of the hardships.
Download
.jpg
(4.45 MB)
Some of the scenery in northwest New Mexico. Shiprock, an old volcanic plug,with Navajo Indians in the foreground.
Download
.jpg
(3.4 MB)
Aerial photograph of the Salmon River showing the rugged nature of the country. The triangle marks a triangulation station.
Download
.jpg
(4.43 MB)
Aerial photograph of the Salmon River area showing the rugged nature of thecountry.
Download
.jpg
(5.45 MB)
Measuring the baseline. Head of end tape.
Download
.jpg
(1.93 MB)
Rear end of tape maintaining set tension. Measuring baseline.
Download
.jpg
(1.01 MB)
A view of upper Cook Inlet from Anchorage.
Download
.jpg
(835.39 KB)
Signal stand on Station Snowshoe. Sam White, destined to be famous bush pilot, is with his dog on the right.
Download
.jpg
(2.37 MB)
Looking west off Station Snowshoe.
Download
.jpg
(505.23 KB)
First
Previous
9
10
11
12
13
Next
Last
Back To Top