Contour is one of the important parts of scientific calculation videotext andpowerful tool of investigating the space data in the GIS system.It is widely used inthe geology and engineering domain.

• 等值线是科学计算可视化的重要研究内容,也是地理信息系统研究空间数据的有力工具,在地质工程领域中有着广泛的应用。