Rotatable southern-northern hemisphere same-viewpoint map projection map

Abstract

Projective maps of southern and northern hemispheres are setup on rotatable interlocked subassemblies, which are installed on a base. The projective maps are obtained through following projective method: southern and northern hemispheres are divided along equatorial plane; shapes of warp and weft of southern and northern hemispheres are derived from normal zenithal projection; preconcerted reference point is on axis between northern earth pole and northern celestial pole; projective map of northern hemisphere is obtained through projection plane, and projective map of southern hemisphere is obtained from reflecting the projective plane. The invention emphasizes expressivity of each region in balance as well as spinning character of celestial body possessing the features of easy of viewing, visual and global integration.

Description

technical field [0001] The present invention relates to a world map, in particular to a rotatable southern and northern hemisphere that can be widely used in the research and development of meteorology, oceanography, geography, geology, and navigation, aviation, aerospace, interstellar development, and space exploration. The same viewpoint map projection map. Background technique [0002] The globe is a very effective tool for us to observe the earth, understand the earth, and study the earth. It is a geometric body that is reduced in a certain proportion, so the coordinates and figures on the spherical surface are non-deformable. In addition to being inconvenient to carry and store, there is still a disadvantage that people cannot observe the other half of it at the same time. [0003] The map is a flat carrier that describes the spatial objects on the earth's surface. Through the map, the three-dimensional objects on the earth's surface can be summarized and drawn into a ...

AI Technical Summary

Problems solved by technology

[0008] 1. There are no poles in the figure; (projection plane A)

[0009] 2. The two poles are fractured and deformed greatly; (projection planes A, B, C)

[0010] 3. The southern hemisphere is divided into multiple lobes, and Antarctica is invisible, which divides the global integrity; (projection planes E, F)

[0013] 6. The deformation and distortion of the other hemisphere areas beyond 90° from the central meridian are intensified; (projection planes A, B, E, F)

[0023] In the lunar (or other planetary) globe or its map projection map made based on satellite images, because the corresponding celestial body is a rocky planet lacking liquid water, and because there are no settlements, cities, rivers, lakes and seas, coastlines, transportation Lines, borders, political districts and other basic map symbols, so its map drawing is a planar image lacking a "level origin". Single, even non-professionals tend to have obvious illusions and regard crater depressions as highlands

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