Figure AIII-2.—Index.The set of horizontal angle control notes shown inDifferential leveling notes are shown in figurefigure AIII-8 indicates that the instrument was first setup over station 0 + 00 and indexed on point No. 1. Thehorizontal angle (to the right) to PI No. 1 was thenturned, as well as the horizontal angle to a churchsteeple. This locates the traverse and ties it to a point thatwill not be disturbed The instrument was then movedto PI No. 1 and the deflection angle between 0 + 00 andPI No. 2 was turned (twice), making sure that the anglewas recorded with its proper direction: right (R). Theinstrument was then moved to PI No. 2 and theprocedures repeated‘The set of horizontal taping notes in figure AIII-9shows the proper way to tape and record distancesbetween points. The line in question is taped in bothdirections, showing each distance and the meandistance. The mean distance must be within 1 in 5,000,or third-order accuracy. A good complete sketch isrequired.AIII-10. When making the page check do not add theforesight for station 0 + 00, as it is a side shot. Also, notethat the stadia distance to 0 + 00 has been omitted forthe same reason. When making your sketch, you do notneed to show the backsight and foresight distances onthe sketch-only on the traverse points, and so forth,normally found on a sketch.Horizontal curve notes (fig. AIII-11) should includeall the curve data plus the deflection angles that are tobe turned during the layout of the curve. The sketchshould be as shown here. All stations that were stakedout should be shown and labeled on the sketch.Profile and cross-section level notes (fig. AIII-12)are best recorded from the bottom to the top of the page.The left-hand side of the notes should contain columnsfor stations, backsight (+), height of instrument (HI),foresight (-), and elevations. The right side, as shown,has left, center-line, and right columns. The top numberAIII-2
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