Hinks, Arthur R. (Arthur Robert), 1873-1945 · Cambridge, University press · leaf 160
interpolate for the fractions of degrees. It is farbetter to accustom oneself from the start to work out mentallythe distances in yards, and to take these off the scales of yardsfound on the protractor. Height above ground of the observers eye. In strictness it should be necessary to take account… … Plane Table and Sight Rule: School of MilitaryEngineering pattern.
Maps · Surveying
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