As the complex phenomenon will occur caused by the intersection or superposition of contours of different data, more factors should he considered in filling color of the contour field.

• 因为在同一区域不同数据的等值线可能会出现交叉、重叠等复杂情况，所以充填叠合以后等值线之间的颜色的方法也相应的要考虑更多的因素。