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.
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