并给出了椭圆投影算子的界定常数。
Definition constant of elliptic projection operator is also presented.
与椭圆体模型不同的是，使用正确的投影非常必要，使用不匹配的投影会造成让人笑话的错误，如图3中的布局错误。
Unlike the ellipsoid model, using the correct projection is essential, and using data with mismatched projections often results in comedic errors, such as the layout error seen in Figure 3.
（此图，顺便说一句，此图是整个天空展开成椭圆的图——摩尔维特投影（Mollweide projection） 。）
This map, by the way, is the entire sky spread out into an ellipse, known as a Mollweide projection.
针孔成像模型下非主光轴上的球体成像为椭圆，椭圆中心偏离球心投影点。
The image of sphericity which does not located the principal optic axis is an ellipse based on pinhole model, and the image center offsets from the projection of the sphere center.
球面上共焦点之椭圆、双曲线，在球心投影中仍投影成共焦椭圆、双曲线。
The cofocal ellipse and hyperbola of spherical surface will also be projected into the cofocal ellipse and hyperbola in gnomonic projection.
球面上共焦点之椭圆、双曲线，在球心投影中仍投影成共焦椭圆、双曲线。
The cofocal ellipse and hyperbola of spherical surface will also be projected into the cofocal ellipse and hyperbola in gnomonic projection.
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