Because of the arithmetic having considered the annotation width and the degree of curvature of curve, the distribution of height annotation more even, the arrangement more order and the amount more mezzo of contour.

• 由于该算法同时考虑了注记宽度和曲线的弯曲度,因而与其他算法相比,等高线高程自动注记分布均匀合理,排列整齐,数量适中。