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pl23_theb1736.jpg

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https://www.noaa.gov/media/digital-library-photo/pl23theb1736jpg

Description

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

Credit

C&GS; Season's Report Aslakson 1930-143

Display Date

1930

Location

Philippines

Collection

Historic Coast & Geodetic Survey

Geodesy

Topography-Mapping the Shoreline

Plane Table Mapping

Keywords

Topography

Plane Table