Wild Theodolite

Description
The Wild RDS is a normal direct-reading theodolite similar to the Wild T16. Here, however, a diagram of reduction curves is projected into the field of view, enabling the surveyor to read the horizontal distance and height distance as intercepts of a graduated vertical rod. This example is marked "WILD HEERBRUGG SWITZERLAND RDS-171658" and was probably made in the mid-1970s. It has its original airtight and watertight steel case. The U. S. National Imagery and Mapping Agency transferred it to the Smithsonian in 2000.
Ref: Wild, RDS Auto-Reducing Tacheometer for Vertical Staff (Heerbrugg,n.d.).
Wild, Horizontal Distance and Difference in Height at a Glance. Wild RDS Self-Reducing Tacheometer (Heerbrugg, 1973).
Location
Currently not on view
maker
Wild
place made
Switzerland
Measurements
overall: 11 in; 27.94 cm
telescope aperture: 1 1/2 in; 3.81 cm
ID Number
2000.0257.10
accession number
2000.0257
catalog number
2000.0257.10
Credit Line
U.S. Department of Defense, National Imagery and Mapping Agency, Geodesy and Geophysics Department
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center

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