pl23_theb1748.jpg
Description
Francis X. Popper taking sight with alidade.Plane table work on the Sacramento River Delta
Credit
Captain Francis X. Popper, C&GS;
Display Date
9-Jan-41
Location
Sacramento River Delta, California
Category
Historic Coast & Geodetic Survey
Geodesy
Topography-Mapping the Shoreline
Plane Table Mapping
Keywords
Topography
Plane Table