301-5 - Cross hair Vertical angle Net horz. dist. Net elev....

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GY 301: Geomorphology Lecture Notes: 5 – Alidade 1 9 10 8 vertical cross hair horizontal cross hair quarter interval cross hair ALIDADE STADIA CROSS HAIR full stadia intercept half stadia intercept quarter stadia intercept stadia rod stadia intercept = 9.9 - 7.5 = 2.4 feet distance = 2.4 x 100 = 240 feet Worksheet for Alidade Data Plane table site location description: Party and date: Plane table site elevation (SE): 161.10 Instrument height (IH): 3.50 Stadia intercept Stadia distance
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Unformatted text preview: Cross hair Vertical angle Net horz. dist. Net elev. change (EC) Rod elev. Rod point SI SD (1:100) CH VA SD*(Cos(VA-30))^2 SD*(Tan(VA-30))+(IH-CH) SE+EC NOTES R-1 1.20 120.00 6.50 33.50 119.55 4.34 165.44 ray from 1st alidade station to tree #1 R-2 3.50 350.00 5.50 34.50 347.85 25.55 186.65 ray from 1st alidade station to tree #2 R-3 8.13 813.00 3.30 27.80 811.80-31.03 130.07 ray from 1st alidade station to elevation control point...
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