pl23_theb1735.jpg
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
Category
Historic Coast & Geodetic Survey
Geodesy
Topography-Mapping the Shoreline
Plane Table Mapping
Keywords
Topography
Plane Table