Topographic surveying; including geographic, exploratory, and military mapping, with hints on camping, emergency surgery, and photography . W 80 0 Fig. 117.—Orthographic Equa- Fig. 118.—Orthographic Horizon-TORiAL Projection. tal Projection. disregarding the external projection, we obtain the followingnine kinds of perspective projections: I. Orthographic polar, equatorial, and horizontal projec-tions. (Figs. 115, 117, and 118.) PERSPECTIVE PROJECTIONS. 409- 2. Central (gnomonic) polar, equatorial, and horizontalprojections. (Fig. 115.) ,^ on_ooi__oa. Fig. 119.—Stereographic Equato- Fig. 120.—
Topographic surveying; including geographic, exploratory, and military mapping, with hints on camping, emergency surgery, and photography . W 80 0 Fig. 117.—Orthographic Equa- Fig. 118.—Orthographic Horizon-TORiAL Projection. tal Projection. disregarding the external projection, we obtain the followingnine kinds of perspective projections: I. Orthographic polar, equatorial, and horizontal projec-tions. (Figs. 115, 117, and 118.) PERSPECTIVE PROJECTIONS. 409- 2. Central (gnomonic) polar, equatorial, and horizontalprojections. (Fig. 115.) ,^ on_ooi__oa. Fig. 119.—Stereographic Equato- Fig. 120.—Stereographic Meridio- RiAL Projection. nal Projection. 3. Stereographic equatorial, meridional, and horizontal pro-jections. (Figs. 119, 120, and 121.)
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