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NOAA's Geodesy Collection
Catalog of Images

1000 thumbnail picture
GPS antenna set up over mark close to lumber camp in Icy Bay.
Alaska, Icy Bay 2000 Summer
1001 thumbnail picture
Close-up of home-made radar reflector constructed from house insulation covered with aluminum foil. These reflectors were placed over GPS determined positions and used to control an airborne synthetic aperture radar survey of Icy Bay.
Alaska, Icy Bay 2000 Summer
1002 thumbnail picture
Close-up of home-made radar reflector constructed from house insulation covered with aluminum foil. These reflectors were placed over GPS determined positions and used to control an airborne synthetic aperture radar survey of Icy Bay.
Alaska, Icy Bay 2000 Summer
1003 thumbnail picture
Mike Aslaksen surveying the beach with kinematic GPS mounted on an all-terrain vehicle.
Alaska, Icy Bay 2000 Summer
1004 thumbnail picture
Loading equipment in skiff to transport radar reflectors, GPS antennas, etc. to remote sites around Icy Bay. Shot gun was for protection from potentially hostile bears.
Alaska, Icy Bay 2000 Summer
1005 thumbnail picture
Unloading gear from bush aircraft used for transportation from Yakutat.
Alaska, Icy Bay 2000 Summer
1006 thumbnail picture
One mode of transportation used by lumberjacks in Icy Bay.
Alaska, Icy Bay 2000 Summer
1007 thumbnail picture
NGS Triangulation Party G-19 in Cabool, Missouri. Party chief, Lieutenant John Oswald standing in center with son on shoulders.
Missouri, Cabool 1978 Summer
1008 thumbnail picture
Sign on side of field party trailer designating Party G-19.
1009 thumbnail picture
Bilby Tower with one super (10-foot extension). Approximately 123 feet total to the top.
1010 thumbnail picture
G-19 building trucks with backhoe for digging.
1011 thumbnail picture
Leonard Bergman, building foreman, leveling site for the tower.
1012 thumbnail picture
Donny McFarland digging tower anchor hole.
1013 thumbnail picture
After anchor holes dug, laying out steel for tower construction.
1014 thumbnail picture
Setting anchors for inner and outer towers.
1015 thumbnail picture
Inner and outer tower legs attached to anchor boards of Bilby tower.
1016 thumbnail picture
Attaching the first the first thirteen-foot section to the anchors.
1017 thumbnail picture
Fred Buck on tower beginning construction of Bilby tower.
1018 thumbnail picture
Attaching cross-ties to begin support for second thirteen-foot section of Bilby tower.
1019 thumbnail picture
Builder Donny McFarland securing the second leg section.
1020 thumbnail picture
Securing the second leg section - five of six legs in place.
1021 thumbnail picture
Going up - notice the ladder leg.
1022 thumbnail picture
Builder sitting on construction seat setting leg - not a good job for folks with acrophobia!
1023 thumbnail picture
Securing bolts with additional tower pieces ready to be installed. Note hoist rope powered by winch on ground.
1024 thumbnail picture
Note use of platforms being used as movable stands while building tower.
1025 thumbnail picture
Completing second thirteen-foot section with reference mark in foreground.
1026 thumbnail picture
Typical horizontal control triangulation mark.
1027 thumbnail picture
Mark truck with augur and cement mixer for digging holes and mixing and pouring concrete to set marks.
1028 thumbnail picture
On the third thirteen-foot section.
1029 thumbnail picture
Looking up the tower during construction.
1030 thumbnail picture
Beginning construction of the cage (observer's platform).
1031 thumbnail picture
Installing floor boards of the cage (observer's platform).
1032 thumbnail picture
A 77-foot tower. The height is measured to the top of the inner tower used to support the observing instrument. The top of the outer tower was approximately 10 feet above this.
1033 thumbnail picture
Tower at twilight. Note triangular boards at top of tower for supporting lightkeeper while showing lights to other stations.
1034 thumbnail picture
Paraphernalia in an observer's truck. Note green case in bag containing Wild T- 3 theodolite. Batteries are for showing lights.
1035 thumbnail picture
A Kern collimator for centering the observing tower over the mark.
1036 thumbnail picture
Observer's equipment being hoisted to the top of the observer's platform.
1037 thumbnail picture
Climbing a tower with a super.
1038 thumbnail picture
Ron Ramsey observing with a Wild T-3 theodolite as seen from the lightkeeper's platform on the very top of the tower.
1039 thumbnail picture
Ron Ramsey observing with a Wild T-3 theodolite.
1977
1040 thumbnail picture
Wild T-3 theodolite ready for observing. Chicago skyline in the background.
Illinois, Chicago
1041 thumbnail picture
Objective lens of Wild T-3 theodolite.
Illinois, Chicago
1042 thumbnail picture
Eyepieces for Wild T-3 theodolite. Larger lens was for observing. The smaller lens for reading horizontal and vertical angles.
Illinois, Chicago
1043 thumbnail picture
Observing with Wild T-3 theodolite. Note centering plate secured to inner tower with C-clamps. This plate is directly above the survey mark on the ground below as determined by the collimator in image 1076. Ron Ramsey observer.
Illinois, Chicago
1044 thumbnail picture
Ron Ramsey with Wild T-3 theodolite.
Illinois, Chicago
1045 thumbnail picture
Monroe Rivers with Model 8 Geodimeter (electronic distance measuring instrument.)
Illinois, Chicago
1046 thumbnail picture
Monroe Rivers with Model 8 Geodimeter (electronic distance measuring instrument ) . The Geodimeter is on a 4-foot wooden stand on top of a building.
Illinois, Chicago
1047 thumbnail picture
Model 8 Geodimeter measuring distances from a rooftop in Chicago. Note the red dot to right of instrument. This is the laser-light return signal reflecting from a glass prism atop another building.
Illinois, Chicago
1048 thumbnail picture
Operator control panel of Model 8 Geodimeter.
1049 thumbnail picture
Hewlett-Packard Model 3800 electronic distance measuring device. Approximately 2-mile range.

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Last Updated:
April 30, 2013