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。
Map projection in cartography is a way to present a two-dimensional curved surface on a plane, such as a normal map. Figure 2 shows a Traverse Mercator projection.
绘图法中的地图投影方法可以在平面中表示一个两维的曲面，例如一个标准地图。
Thee students asked:can we make a projection line to the Equator line on a plane?
同学们又问了：我们可以在这个切面上做一个到赤道线的垂线吗？
It is known that the projection of the intersection of quadrics with common plane of symmetry on this plane is a curve of second order.
具有公共对称平面的二次曲面的交线在该平面上的投影为二次曲线。
A new projected light-lineal light is put forth according to production and actual life, lineal projection on point, line and plane.
并以此为基点，系统地研究了点、直线和平面的线投影。
Based on the 3d data of vertex, edges and planes, which are obtained from the tri Angle projection of a plane body, the calculation method of the plane body formation is hence worked out.
提出一种以从平面体三面投影中“提取”顶点、棱线和棱面三维信息为基础，得出平面体“构型”的计算方法。
In order to have a better topology of the final mesh we created a high-tessellated plane and we projected it onto the base terrain using the Geometry Projection script found on scriptspot.
为了使最后网孔呈现出更好的地形特征，我们创建了一个高度棋盘格式的平面图，使用scriptspot找到的Geometry Projection script将其投射到基础地形上。
In order to have a better topology of the final mesh we created a high-tessellated plane and we projected it onto the base terrain using the Geometry Projection script found on scriptspot.
为了使最后网孔呈现出更好的地形特征，我们创建了一个高度棋盘格式的平面图，使用scriptspot找到的Geometry Projection script将其投射到基础地形上。
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