Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 289
Dh equal to Dh. By joining these pointswe obtain the elevation required. We have now, from the simple elevation A, obtained aprojection (A^) inclined to both co-ordinate planes, i.e. 121°with the H.P. and 23° with the V.P., by simply changing theposition of the ground line. Problem 54. To draw cm… … Fig. 69. elevations and plans from it by changing the position of the XXII ON THE ALTERATION OF THE GROUND LINE 269 ground line, it is necessary in the first place to arrange it sothat it is shown its full length ; for instance, the line ah is thefull length of the diagonal to which this problem…
Geometrical drawing
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