The methods used in primary level and triangulation work in unsettled and broken country (1909)
Stewart, John Truesdale · leaf 260
Line of sight to observed &tafieri. to <7 = /SO A/ethod ot° arrarngmy reference points so that eithered as an off confer station. … /J C £ - Port/on of s/^nai illuminated.& c~ D = f^ort/on of sign at observed.£ - Center ofsignal as observedfrom distant sfaf/on. Sketch sA otv//7jf error due to ohs erwng an iJ/uminal/edsijpna Iwhen //ne of sight is notparat/el to suns rays.
Geodesy · Surveying · Triangulation · Theses
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