. The elements of railroad engineering . aic sum of the depar-tures for the different stations, placing each successive sumopposite its proper station. In the example given in Art. 1330, beginning at Station-?, we obtain the fol-lowing results. The work is provedto be correct by thelatitudes and depar-tures for Station 1coming out equal to0. To apply thesetotal latitudes and de-partures in platting, Stations. Tc fr tal Latitudesom station 1. Total Departuresfrom Station 1. 1 2 + + 3 + + 4 + L15 + 5 + 1 724 LAND SURVEYING. we draw a meridi
. The elements of railroad engineering . aic sum of the depar-tures for the different stations, placing each successive sumopposite its proper station. In the example given in Art. 1330, beginning at Station-?, we obtain the fol-lowing results. The work is provedto be correct by thelatitudes and depar-tures for Station 1coming out equal to0. To apply thesetotal latitudes and de-partures in platting, Stations. Tc fr tal Latitudesom station 1. Total Departuresfrom Station 1. 1 2 + + 3 + + 4 + L15 + 5 + 1 724 LAND SURVEYING. we draw a meridian through the point taken as Station 1,Fig. 321. Scale off from Station 1 upwards on this meridianthe latitude chains to A and to the right from A, andperpendicularly lay off the departure chains to Station2. Join 1-2. From 1 again lay off the latitude ( =(j + l()) chains to B, and to the right perpendicularlythe departure (= +) chains to Station 2-3, and proceed in like manner to locate Stations. A and -■>, laying off -[- latitudes above Station 1 and +departures to the right of the meridian, and — latitudesbelow Station 1 and — departures to the left of the merid-ian. The principal advantages of this mode of plattingare rapidity of work, the fact that each course is plattedindependently, and the certainty of the plats closing, pro-vided the latitudes and departures have previously beenbalanced. 1333. Calculating the Content.—The survey of afield or farm having been made and platted, the content canalways be found by dividing the plat into triangles, and LAND SURVEYING. 725 scaling off their bases and perpendiculars from which thecontents are calculated. This and other methods previouslymentioned are only approximate, the degree of accuracydepending upon the largeness of the scale and the skill ofthe draftsman. The method of calculating content bylatitudes and departures is perfectly accurate, and does notrequire the previous
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
