This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ...4-1-3 and 1-3-4, Fig. 52a. The length 1 to 2 can then be plotted to scale, then the angle 3-1-2 can be laid off at the point 1, giving the direction of the line 1-3, and the angle 1-2-3 at the point 2, also giving the direction of the point 3. The intersection of these two lines, as shown in Fig. 526, determines the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ...4-1-3 and 1-3-4, Fig. 52a. The length 1 to 2 can then be plotted to scale, then the angle 3-1-2 can be laid off at the point 1, giving the direction of the line 1-3, and the angle 1-2-3 at the point 2, also giving the direction of the point 3. The intersection of these two lines, as shown in Fig. 526, determines the location of the point 3. The point 4 is determined in a similar manner by plotting directions from 1 and 3 with the line 1-3 as a base. EXERCISES 1. Given the following distances in feet between six points plot their loca tion to the scale 1 inch equals 100 feet. 1-2, 260; 2-3, 273; 3-4, 94; 4-5, 277; 5-6, 171 6-1, 298; 1-5, 317; 2-5, 356, and 3-5, 281. 2. Given the following interior angle and distance measurements plot the traverse to the same scale as in (1). Distances in feet 1-2, 169; 2-3, 122; 3-4, 76; 4-5, 221; 5-6,174; and 6-1, 204. Angles 1-2-3, 41 30'; 2-3-4, 277 0'; 3-4-5, 108 10'; 4-5-6, 60 50'; and 5-6-1, 126 0'. 3. In Fig. 52 the base line measures 500 yards. The measured angles are as follows: 3-1-2, 68 15'; 1-2-3, 76 30'; 4-1-3, 32 40', and 1-3-4, 59 10'. Plot the points to a scale of 12 inches equals one mile. Art. 23. Pacing And The Scale Of Paces It will be clear from the preceding article that one of the fundamental operations in mapping or surveying is the measurement of distance. It is also clear from our studies of maps that maps show horizontal distances; that is, if we have two points on a hillside, such as A and B, shown in profile in Fig. 53, the distance between these points as shown on a map would be the horizontal distance AC. In making our measurements in the field it is possible to measure the horizontal distance directly by holding a tape on the ground at B and lifting the lower end sufficiently high above A so t...
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Add this copy of Topographic Maps and Sketch Mapping to cart. $100.00, very good condition, Sold by Jeffrey Marks Rare Books, ABAA rated 5.0 out of 5 stars, ships from Rochester, NY, UNITED STATES, published 1920 by John Wiley.
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Seller's Description:
A very good copy with some light rubbing to extremities of the spine; the sheets in fine condition. 175 pp. With numerous illustrations, some in full color, and a folded map in pocket at rear. Tall 8vo,
