1700 | |
Heliotrope setup at camp of lightkeeper. Triangulation party of William M. Scaife |
Montana-Idaho 1922 |
1701 | |
Showing light at Station Northome. Battery powered lights about 110 feet above ground. Triangulation party of Carl Aslakson |
Northome, Minnesota August 1934 |
1702 | |
Signal lamps |
|
1703 | |
Signal lamp and batteries |
|
1704 | |
Measuring baseline with wooden rods. French expedition to Peru |
Peru 1730? |
1705 | |
Irish Ordinance Survey baseline. First to use bi-metallic compensating principal for base line measurement |
Ireland 1828 |
1706 | |
Use of odometer for measuring distances |
England 1728 |
1707 | |
Land surveyor using odometer in United States. A private county surveyor |
Eastern United States 1850? |
1708 | |
Coast Survey party measuring Key Largo Base. Base Line party of Alexander Dallas Bache |
Key Largo, Florida 1854 |
1709 | |
Coast Survey party measuring Epping Plains Base. The last base line measured by Bache. Base Line party of Alexander Dallas Bache |
Epping Plains, Maine 1857 |
1710 | |
Coast Survey party measuring Epping Plains Base. The last base line measured by Bache. Base Line party of Alexander Dallas Bache |
Epping Plains, Maine 1857 |
1711 | |
Graded road made to measure Epping Plains Base. Base Line party of Alexander Dallas Bache |
Epping Plains, Maine 1857 |
1712 | |
Yolo Buggy used to transport and shade base measuring instruments. Yolo Base Line, one of the most accurate measured in the Nineteenth Century. Base Line party of George Davidson |
Sacramento Valley, California 1881 |
1713 | |
Yolo Buggy with George Davidson. Base Line party of George Davidson. The last time such buggies were used was in 1962 |
Sacramento Valley, California 1881 |
1714 | |
Army surveyor with odometer carriage. Survey of public lands. Odometer worked fairly well on flat ground |
1880's |
1715 | |
Shelton 100-meter comparator -- Making contact. William Bowie on left |
Midwest United States 1902? |
1716 | |
At work with No. 17. William Bowie in center with white hat |
Midwest United States 1902? |
1717 | |
Shelton 100-meter comparator |
Midwest United States 1902? |
1718 | |
Running levels along the Stanfield Base. Base line and astro party of C. V. Hodgson |
Stanfield, Oregon 1916 |
1719 | |
Measuring base with Invar tape. Tape underway. Base line and astro party of C. V. Hodgson |
Stanfield, Oregon 1916 |
1720 | |
Off to measure a base with Invar tape. Party of C. G. Quillian |
Southeast Alaska 1916 |
1721 | |
Time and tide waits for no man. Base line measurement in southeast Alaska. Party of C. G. Quillian |
Southeast Alaska 1916 |
1722 | |
It sure is tough to stay dry with the tide coming in. Base line measurement in southeast Alaska. Party of C. G. Quillian |
Southeast Alaska 1916 |
1723 | |
Measuring the Pasadena Base. Measured at accuracy of at least 1 part in 5 million. Measured accurately to help Albert Michelson determine velocity of light. Base line party of Clement L. Garner |
Pasadena, California 1922 |
1724 | |
Measuring through house on Pasadena Base. Line selected to pass through window and out other side. Base line length was over 20 miles. Base line party of Clement L. Garner |
Pasadena, California 1922 |
1725 | |
Crossing ravines on stands to keep line horizontal. Pasadena Base measurement. Base line party of Clement L. Garner |
Pasadena, California 1922 |
1726 | |
Measuring Pasadena Base across wash at foot of San Antonio Canyon. Base line party of Clement L. Garner |
Pasadena, California 1922 |
1727 | |
Base line measurement with Invar tape. Off Launch ELSIE |
Georgia coast 1924 |
1728 | |
Traverse measurements in sub-zero conditions. Making front contact. Traverse party of Casper Durgin |
Canada - Minnesota border 1924 |
1729 | |
Traverse measurements in sub-zero conditions. Traverse party of Casper Durgin |
Canada - Minnesota border 1924 |
1730 | |
Making short setup with steel tape at Station Goodman. Triangulation party of E. O. Heaton |
Rochester, New York 1925 |
1731 | |
Making rear contact. Triangulation party of E. O. Heaton |
Rochester, New York 1925 |
1732 | |
Measuring the base - note police protection. Triangulation party of E. O. Heaton |
Rochester, New York 1925 |
1733 | |
Base line measurement - maintaining proper tension on the tape. |
|
1734 | |
Lining stakes in on the Ranchester Base. Triangulation party of Herman Odessey |
Ranchester, Wyoming 1925 |
1735 | |
Measuring over stands on the Inman Base. Triangulation party of E. O. Heaton |
Atlanta, Georgia 1927 |
1736 | |
Traverse party at Station Turn. Area flooded after August 13, 1928 hurricane. Party off of HYDROGRAPHER |
West Coast of Florida 1928 |
1737 | |
Traverse party in the Everglades. Forward measurement party. Party off of HYDROGRAPHER |
West Coast of Florida 1928 |
1738 | |
Taking measurement while tension being maintained. |
|
1739 | |
Base line measurement party. Triangulation party of Carl Aslakson |
East Coast of United States 1934? |
1740 | |
Taping across intersection. St. Nicholas and Amsterdam Avenue. Note police protection |
New York City 1937 |
1741 | |
Taping party protected from traffic by police |
New York City 1937 |
1742 | |
Carcross Base. Alcan Highway geodetic control work. Triangulation party of John Bowie |
Yukon Territory, Canada 1943 |
1743 | |
First C&GS electronic base line measurements. Base crossings by aircraft and ship over Shoran network. Minimum value from two range-range stations gives distance. Base line party of P. C. Doran |
Bering Sea, Alaska 1951 |
1744 | |
First C&GS electronic base line measurements. Base crossings by ship over Shoran network. Minimum value from two range-range stations gives distance. C&GS Ship EXPLORER |
Bering Sea, Alaska 1951 |
1745 | |
First Tellurometer traverse by C&GS. Atka Island traverse. Party off of EXPLORER |
Atka Island, Aleutians, Alaska 1957 |
1746 | |
Tellurometer traverse in Alaska |
Alaska 1965 |
1747 | |
Tellurometer traverse at Columbia Glacier |
Prince William Sound, Alaska |
1748 | |
Tellurometer traverse somewhere cold and miserable. Note clouds below station |
Alaska |
1749 | |
Electro-chain measurements at Sawmill Bay. |
Valdez area, Alaska 1966 |