| 摘要 |
According to one embodiment, world maps in the Azimuthal Equidistant (AE) Hemispheric projection are formed by depicting the main hemisphere of a globe in full and the opposing hemisphere in the form of two semi-hemispheres contiguous two spaced side portions of the main hemisphere. Any city (or location) of interest in the world can be highlighted as the center point of the main hemisphere. Each of these two semi-hemispheres is movable along the circumference of the main hemisphere so that a straight line can be drawn from the center point of the main hemisphere to any other point on the two semi-hemispheres via corresponding tangent points. This straight line is a part of a great circle and will show correct distance and direction from the center point to the other point. A transparent ruler, a set of gears, a compass rose and others may be attached to this map for quicker and easier acquisition of correct distance and direction. Differing from the regular AE projection, this AE Hemispheric projection has less distortion and more realistic shapes of the continents, even at remote areas, and also shows the antipodal point explicitly as a point. |
