Aerial photography vs. plane table mapping. Much greater detail possible and significantly quicker with photography

Aerial photo location of bridge vs. reported location. Superiority of aerial photography for mapping being demonstrated conclusively

Plane table setup in shoal water - legs driven about 6" into sand. Note rodman slogging ashore in line with alidade. Combined operations party of H. A. Paton

24' skiff built for under $100.00. Powered by K-70 Johnson outboard motor. Combined operations party of H. A. Paton

Elevated setup for plane table. Combined operations party of H. A. Paton

Topographic surveying in Gastineau Channel. Off of WESTDAHL

Topographic surveying at dusk.

Glacier Bay topographic mapping. Cartoon by Clarence Petersen recalls real incident. Off of WESTDAHL

More fun in Glacier Bay area. Cartoon by Clarence Petersen. Off of WESTDAHL

Plane table work at Station Dove. Hubert Paton, Ray Tryon, and Dryman

Plane table work at Station Dove. Lady (crewman last name), Hubert A. Paton, and Beagle

Francis X. Popper taking sight with alidade. Plane table work on the Sacramento River Delta

Plane table work with airport survey. Probably early 1960's. Probably some of the last plane table work done in the C&GS

Commander Emerson Jones working with aerial photographs.

Leveling across Isthmus of Panama.

Level crew. Burger, Boone, Libby, Babcock, Peterson. Level crew of W. H. Burger

Level crew with velocipede. Holtzmann on car. Level party of B. E. Tilton

Taking a backsight. Level party of W. H. Burger

Rodman holding rod vertical during observations.

Rear rodman passing front rodman, recorder pulling. Passing the mallet so rear rodman can drive spike to steady rod. Level crew of W. H. Burger

Observer riding ahead. Level crew of W. H. Burger

W. H. Burger observing. Note standing straight up to observe - minimizing fatigue. Level crew of W. H. Burger

First order leveling. Mechanized leveling with velocipede. Party of M. E. Lutz

First order leveling. Mechanized leveling with velocipede. Party of M. E. Lutz

First order leveling. Mechanized leveling with velocipede. Party of M. E. Lutz

Showing how line of sight clears recorder with inclined tripod. Mechanized leveling with velocipede. Party of J. D. Crichton

Level setup on motor velocipede. Level center-mounted on velocipede

Level setup with inclined tripod on motor velocipede. J. D. Crichton observing. Party of J. D. Crichton

Crew with motor velocipedes and inclined level. Party of J. D. Crichton

Recording instrument mounted on left side of velocipede. Party of J. D. Crichton

Working along the Southern Pacific Railroad. Rodman at benchmark. Observing crew even with engine on right. Velocipede removed from tracks. Level party of C. A. Egner

Observing from level mounted on velocipede. Level center-mounted on velocipede. Crossing trestle on Southern Pacific Railroad. Level party of C. A. Egner

Level crew with the tools of the trade. Level party of Caspar Durgin

Level crew with the tools of the trade. Sub-party of H. W. Hough. Level party of H. W. Hough

Level crew in the Arizona desert. Level party of Fred E. Joeckel

Leveling down the trail into Glen Canyon. Level party of Fred E. Joeckel

Leveling down the trail into Glen Canyon. Level party of Fred E. Joeckel

Connecting the line - two level crews meet in Glen Canyon, Colorado River. Level parties of Fred E. Joeckel and Floyd W. Hough

The boat - means of transportation in Glen Canyon, Colorado River. Level party of Fred E. Joeckel

Level crew in boat in Glen Canyon, Colorado River. Level party of Fred E. Joeckel

Connecting the line - party chiefs shaking hands. Fred E. Joekel on left - Floyd W. Hough on right

Leveling observations between Valdez and Fairbanks. Level party of Herman Odessey

Entering a tunnel on motor velocipede. Sure hope nobody's coming the other way. Level party of Herman Odessey

Setting the velocipede back on the tracks after train passes. Level party of Herman Odessey

Mosquito protection in Colorado. Level party of Glendon Boothe

Rodman Fisk holding the level rod steady. Level party of Glendon Boothe

First order leveling in Atlanta. Level party of E. O. Heaton

Leveling on Alameda Boulevard in Los Angeles. Level party of Glendon Boothe

Beginning a spur line into Mokuaweoweo Crater. Leveling in support of gravity operations on Mauna Loa. Party of Lansing Simmons

The last setup on the summit of Mauna Loa. Party of Lansing Simmons