Digital Library Search
Image
Download ( 3.91 MB )Permalink
https://www.noaa.gov/media/digital-library-photo/pl23cgs05280jpgDescription
Plate 31, Coast Survey Report 1865 by E. Hergesheimer. These diagrams arebelieved to include all possible conditions of the relation of the position ofan undetermined point to three fixed points. A discussion of this diagrambegins on page 215 of the 1865 Annual Report within Appendix No. 22, On thePlane-Table and Its Use in Topographical Surveying. (Image credit: NARA C&GS; Colllection)