Importance

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Abstract

According to the method, a projection cylinder, containing the globe (1) or secant to it, is defined, and the points on the globe, whose coordinates are defined by a longitude (.phi.) and a latitude (.theta.) are projected on to this cylinder by associating an abscissa (X) with each longitude (o) and an ordinate (Y), with each latitude (.phi.) with in a frame of reference of the developed cylinder (2), characterized in that: a sequence of n+1 angles of latitude (.theta..sub.0, . . . , .theta..sub.n) is determined, defining n (n.gtoreq.2) distinct ranges of latitude, each northern and/or southern hemisphere of the globe (1) is divided into n peripheral latitude zones (4) corresponding to the n ranges of the sequence, each being defined by two parallels (5, 6) of limit latitude, the parallels of limit latitude (5, 6) are projected on to the projection cylinder, and each point (A) of one of the n latitude zones (4) is projected into a point (A') on the cylinder, whose ordinate is contained and interpolated between those of the projected parallels of limit latitude, according to the relative latitude (a) of the point (A) between the two parallels (5, 6).

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First Claim