An approach is first posed by using gnomonic projection,based on the problem remaining unresolved,which is about the coating joint modeling and the joint overlap of spherical equilateral polygon.

• 针对球面等边多边形包覆拼接建模及出现拼接重叠等问题,分析了心射球面投射原理和共球面等边多面体的结构特征,提出了共球面等边多面体作心射球面投射的方法。