. Railroad construction, theory and practice; a text-book for the use of students in colleges and technical schools . Fig. Fig. 6. 13. Stadia method. This method is best adapted to fairlyopen country where a ^shot^ to any desired point may betaken without clearing. The backbone survey Hne is the same 18 RAILROAD CONSTRUCTION. § 13. as in the previous method except that each course is h* mi ted tothe practicable length of a stadia sight. The distance betweenstations should be checked by foiesight and backsight—also thevertical angle. Azimuths should be checked by the the
. Railroad construction, theory and practice; a text-book for the use of students in colleges and technical schools . Fig. Fig. 6. 13. Stadia method. This method is best adapted to fairlyopen country where a ^shot^ to any desired point may betaken without clearing. The backbone survey Hne is the same 18 RAILROAD CONSTRUCTION. § 13. as in the previous method except that each course is h* mi ted tothe practicable length of a stadia sight. The distance betweenstations should be checked by foiesight and backsight—also thevertical angle. Azimuths should be checked by the the vital importance of levelmg on a railroad surveyit might be considered desirable to run a line of levels over thestadia stations in order that the leveling may be as precise aspossible; but when it is considered that a preliminary survey isa somewhat hasty survey of a route that may be abandoned, andthat the errors of leveling by the stadia method (which are con-pensating) may be so minimized that no proposed route wouldbe abandoned on account of such small error, and that the effectof such an error may be usually neu
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