Integrated generalization method of contours and rivers considering geographic characteristics

In the integrated generalization of contours and rivers, it is more important to consider their geographical characteristics in addition focusing on graph generalization. Therefore, we elaborated which rivers depend generalization, qualitatively describe quantitatively characterize (spatial elements information content characteristics), put forward method considering characteristics. Based characteristics, this article first identifies relief river network morphology, then as an essential terrain constraint, spatial analysis selection topographic feature lines were carried out. Second, according method, discretized into 3D points along with describing semantic giving weights. Finally, experiment was implemented well results obtained.