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。
Gnomonic charts are published covering the Atlantic, Pacific and Indian Oceans, except for an equatorial belt in each ocean.
出版大圆海图覆盖大西洋，太平洋和印度洋（各大洋近赤道带水域除外）。
Gnomonic charts are published covering the Atlantic, Pacific and Indian Oceans, except for an equatorial belt in each ocean.
出版大圆海图覆盖大西洋，太平洋和印度洋（各大洋近赤道带水域除外）。
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