Topographical Drawing and Sketching: Including Applications of Photography, Τόμος 1J. Wiley & sons, 1886 - 129 σελίδες |
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
angle of inclination applied arcs base bearings blue brush centre clinometer colors constructed convenient coordinates copy corresponding cosec curves described determined direction division drawn edge English units equidistant points extremities feet figure fixed flat tint given graduated greatest descent height hill-shading horizontal inches India ink instrument intermediate intersection intervals latter Lehmann's length lines of greatest located marked measured meridian line method Metres middle point mile oblique observed obtained outlines pantograph paper parallel pencil perpendicular placed plane Plate plotted polyconic projection position produced projection protractor Prussian blue radius ratio readily reading rectangles reduction reference relative heights represented right line road rule scale of distances scale of inclination scale of shade sheet shown in Fig side signs sketch spaces squares straight-edge subdivided summit superposed surface survey tangent tion topographical drawing tract traversed triangles usually vernier vertical angle vertical illumination working-scale ΙΟ
Δημοφιλή αποσπάσματα
Σελίδα 82 - The square described on the hypothenuse of a rightangled triangle is equal to the sum of the squares described on the other two sides.
Σελίδα 51 - To develop the surfaces, divide the circumference of the cylinder into any number of equal parts, and through the points of division draw lines parallel to the center line of the cy Under.
Σελίδα 116 - P; it was also noticed that the line to the farm (/) passed to the right of the farm (K), which observation helped to correct the sketch : also it could be seen that the line to H passed over K. The direction (J) was next taken, showing the fall of ground and the direction of the road (D).
Σελίδα 117 - W being intersected, gave the boundary of the ground (I-): the farm in front, observed from T, could no longer be seen. " Passing, then, down by the right and along the hollow between the two great hills, I went to the Hermita, and this point having been before fixed, from thence the direction of the further fall of the great hill (S) and two slopes of the hill on the further side of the Calvarosa valley were secured, as well as the direction of the watercourse above and below. I then passed down...
Σελίδα 52 - ... increased intensity of shade is produced by keeping the same space between the hachures as for 40°, while increasing the space in which a certain number of hachures are placed by 25 per cent for a 45° slope, 50 per cent for a 55° slope, 75 per cent for a 65° slope, and 100 per cent for a 75° slope. For slopes less than 5° the breadth of hachures is the same as for 5°, but the 5° space is increased. 25 per cent for 4°, 50 per cent for 3°, 75 per cent for 2°, and 100 per cent for 1°....
Σελίδα 116 - A line was drawn to the fall, or gap, in the ground (T), taking great care that this, as well as those to s, Calvarosa, and the chapel, were as correct as possible in regard to the line from p, because the connection of the right of the position rested on this point, and the accuracy of...
Σελίδα 116 - ... dismount, and galloped from station to station. C. " Having finished at A, I went along the road to Huerta (C), a farm of only two or three buildings, which was the only point to be seen in that direction from A ; judging, then, this distance galloped over, the line from the church of Sta. Martha to C was assumed as the base.
Σελίδα 117 - A farm also, in a hollow of some wood to the front, was also noted. X. " I then went to the smaller hill, intending to go to the top, but the rocks were so rugged I could not ride up ; so, standing on a line between it and T, at X, that station was fixed by observing the direction to E and to the Hermita. " The line to Calvarosa from R was next intersected, which fixed that place. The direction to the houses (Z) was also laid down, and this place turned out to be the village of Arapiles ; and the...
Σελίδα 116 - Marta, which fixed P. It was also noticed that the line to the farm, I, passed to the right of the farm K, which observation helped to correct the sketch ; also it could be seen that the line to H passed over K. The direction J was next taken, showing the fall of ground and the direction of the road D. There were no other points that could be fixed between D and the skirt of the wood, E. E.
Σελίδα 117 - Hermita could be intersected, as well as the ground to the rear (u, v, and E). The direction (x) of the smaller hill was taken, and the line over its summit, it was observed, passed to the abrupt right-hand slope of the ground (w), to the rear of the position. A farm also, in a hollow of some wood to the front, was also noted. x. " I then went to the smaller hill, intending to go to the top, but the rocks were so rugged I could not ride up; so, standing on a line between it and T, at x, that station...