The heat and cold sources are distributed at the stereographic projection map of Northern Hemisphere on the dishpan bottom.

将热源及冷源分布在绘有北半球极赤射面投影地图的底面上。

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Under general feasible set, in consideration of the algorithms for nonsmooth equations and the properties of projection map, the algorithms using the normal equation to solve are discussed.

在一般可行集下，结合非光滑方程组解法及投影映射的性质，讨论了法方程求解变分不等式问题的算法构成。

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Maps (on paper or on the screen) are flat surfaces; they require a transformation from the curved surface of the earth to the flat plane: a map projection.

纸上或屏幕上的地图是平面的；它们需要从地球的曲面向平面进行转换：地图投影。

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Cumulatively, these resulted in the famous projection map of Gerardus Mercator in 1569, a plan of the world that still forms the basis of schoolroom teaching and Google Maps.

WSJ: Lost in Our Maps: A History of Cartographic Catastrophes