San Francisco : Architect and Engineer, Inc · leaf 133
six. But, whereas a globe is continued by on which the direction of the wind is Innportant. the mechanical act of revolving it, on the (2) The Orthomeric Variant shows correct Variants of the Butterfly Map, this continuity is scale areas, although true compass directions achieved by replacement of… … MechanicalPrinciple GeometricalPrinciple 1. A quarter of /lie Conformal Variant. 2. Half the Equal Area Variant..?. .1 quarter of the Gnomonic Variant. The Butlerjiy Mop^Octahedral System of Projection, li. J. S. Caliill, lSW-1034 raphy, especially in economic surveys of prod- which map the whole…
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