摘要
介绍一种绘制海洋沉积物类型分布图的新方法。假定构成海洋沉积物粒度(砂、粉砂和粘土)的比例数值在海床分布呈线性或非线性渐变过程。在绘图海域内,"无缝"加密设置有限个插值点,避开不易操作的类型插值问题。利用已知采样点沉积物中砂、粉砂和粘土比例数值,直接采用数值方法单因子插值,根据每个插值点沉积物中砂、粉砂和粘土比例数值,按谢帕德沉积物分类方法,确定每个点的沉积物类型,并用相应色彩代表,形成海洋表层沉积物类型分布图。实际绘图结果表明,本方法优于传统海洋沉积物类型分布图绘制方法。
One new method is introduced in the study of drawing distribution graph of surface sediment types at seabed Assumed that the proportional numerical value which composed the distribution of surface sediment types at seabed satisfied the gradual change process with linearity or nonlinearity. Finite interpolation points are densely arranged with a joint less method in the drawing sea area to avoid the interpolation problem with types which has difficulty in operation. The proportional numerical value which includes sand, silt and clay at the sediment sample point is directly used to interpolate the interpolation points respectively. Shepard classified scheme of surface sediment is used to determine the sediment type of every point. Then the distribution graph of surface sediment types is formed by specified color of different sediment types. The results show that the new method is superior to the conventional one when drawing surface sediment types distribution graph at seabed. The new method is advised to be used widely in the oceanography.
出处
《海洋通报》
CAS
CSCD
北大核心
2011年第6期615-618,共4页
Marine Science Bulletin
关键词
沉积物
分类
绘图
数值
sediment at seabed
classify
drawing graph
numerical value
