Percival, A. S. (Archibald Stanley), 1862- · London, New York [etc.] Longmans, Green and co. · leaf 11
he ground line (G.L.), whereas NMKFrepresents a vertical plane (V.Pl). Every plane that is parallel toG.Pl. is a horizontal plane (H.Pl.), and in this book every planethat is parallel to the picture plane (P.Pl.) is called a vertical plane(V.P1.). The other planes, such as AF, BH, OI, DJ, and… … represented by OI, and occupies the middle of the diagram. Asthe edge only of C.S.Pl. can be seen, it is represented only by avertical line. The horizontal line drawn through C is the horizonline (H.L.). When viewing a long street that extends horizontally in frontof one, the line of roofs, if…
Perspective
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