trigonometric leveling

Formation and evolution of underwater delta in Minjiang Estuary Ⅱ. Underwater delta plain;

闽江口水下三角洲的形成与演变 Ⅱ.水下三角洲平原

For the plane triangle in building irregularly triangle net(TIN)of DEM,some new algorithms are put forward to eliminate plane triangle.

提出了利用自动增加特征点消除平三角形的方法,并通过重构等高线验证了构网算法的实用性和有效性。