A study for ambiguity in tracing depth contour on regular grid
Lihua Zhang, Qing Xing Zhu · Cehui kexue · 2005
Assume that there is an equivalent node on each side of a grid when using gridding method to draw isoline,how to connect these nodes is ambiguous.Usual algorithms to eliminate the ambiguity in tracing equivalent nodes are introduced.In consideration of the special demands of plotting depth contour,irrationality of the methods for tracing equal depth node is analyzed.To eliminate the ambiguity in drawing depth contour,the method that the following node should thread the side which have shallower depth than another side are proposed.By theoretical analyses and practical applications,the methods suggested in the paper are found to be effective.