engleski

Gilbert Projection and Gilbert Globe

Among many of map projections in use for world maps there are only a few of them in which the spherical shape of the earth is preserved to a greater extent. Among them, the Gilbert projection should be especially emphasized. Gilbert perspective projection represents the world as people usually see it, from space and in the round. With its round shape it reminds of the globe, and at the same time it represents the whole earth's surface. This map projection is composed from two mappings. First, the entire earth taken as a sphere is transformed onto each half of another sphere, resulting in a conformal sphere with two images of the earth. Second, one of the hemispheres of the two-world sphere is projected onto a plane using the orthographic projection. Furthermore, a modification of Gilbert projection has been proposed by Lapaine and Frančula with an aim of designing a world map which could be a base for making a series of global thematic maps. The modification has been performed by choosing a different cartographic pole. Also, instead of orthographic projection in the second step, a general perspective projection has been applied which enables the new possibilities of application.

Gilbert projection; Gilbert globe

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