Shore camp for Tellurometer and angle measurements. Party off of PATHFINDER

Lester B. Smith making Tellurometer observations. Off of SURVEYOR

Electro-chain observations. Off of PATHFINDER

Laser beam from Geodimeter. Transcontinental traverse party of Woodrow Johnson

Laser beam from Geodimeter. Transcontinental traverse party of Woodrow Johnson

Claude Stevens operating Geodimeter. Transcontinental traverse party of Woodrow Johnson

Laser light emitting from Geodimeter. Transcontinental traverse party of Woodrow Johnson

Prismatic mirrors for reflecting laser light beam. Transcontinental traverse party of Woodrow Johnson

Small infra-red light geodimeter

Total station geodimeter used for calibrating ship navigation system. Off of NOAA Ship PEIRCE

Total station geodimeter used for calibrating ship navigation system. Off of NOAA Ship PEIRCE

Total station geodimeter used for calibrating ship navigation system. Off of NOAA Ship PEIRCE

Diagram of plane table with cutaway showing tripod head. C&GS Superintendent's Report for 1865

Plane table crew in Prince William Sound area. Crew off of TAKU

Plane table setup on undercut coral islet. Crew off of PATHFINDER

Plane table setup in water

Plane table setup on undercut coral islet. Crew off of PATHFINDER

Plane table setup on a coral reef. Crew off of PATHFINDER

Plane table setup on a boulder

Filipino padre watching topographic work. Crew off of FATHOMER

Plane table mapping in the foothills of Mt. Natazhat. International Boundary Commission work

Plane table party locating a rock that bares only at a minus tide. Combined operations party of C. G. Quillian

Plane table work on a rocky shore.

C. D. Meaney at Marquesas, Florida Reef topography. Working offshore in the water to cut in mangrove swamp line

Plane table setup in mangrove swamp. Crew off of SIALIA

Charles D. Meaney and plane table party

Plane table set up in the water. Crew off of SIALIA

Plane table work in Southeast Alaska. Crew off of EXPLORER

Rodman with stadia rod for distance measurement. Crew off of EXPLORER

Elliott B. Roberts on plane table. Crew off of SURVEYOR

Plane table setup in vicinity of mangrove swamps

Jack Bond - victim of crocodile attack. Huge agressive salt-water crocodiles were common in the southern Philippines. At least one other Coast Surveyor was attacked by crocodile

Bloomberg's topo party on Calayan Island. Crew off of PATHFINDER

Bloomberg on the instrument. Off of PATHFINDER

Paul Smith on the plane table. Off of HYDROGRAPHER

Carl Aslakson on plane table. Off of Launch ELSIE

Topo work among the Spanish bayonet. Off of Launch ELSIE

A hot day on the beach at Bird Island. Off of Launch ELSIE

Paul Smith on the plane table. Off of HYDROGRAPHER

Occupying station for reconnaissance along arc from Fairbanks to 141st Meridian. Reconnaissance party of Sam O. White. What a grand dog!

Carl Aslakson at plane table in mangrove area. Crew off of MARINDUQUE

Paul Smith at alidade. Off of SURVEYOR

L. S. Hubbard at plane table in glacial area. Off of SURVEYOR

Paul Smith on the plane table. Off of SURVEYOR

L. S. Hubbard at plane table in glacial area. Off of SURVEYOR

Traverse party at foot of ice cliffs on Crillon Glacier. Party off of SURVEYOR

Plane table topography in Prince William Sound area. Party off of SURVEYOR

Topo work in Black Bay area. Party off of WESTDAHL

Sextometer invented by Carl Aslakson. Known distance between sighting points. Sextant angle varies with distance

Sextometer invented by Carl Aslakson. Known distance between sighting points. Sextant angle varies with distance