A hierarchical pyramid method for managing large-scale high-resolution drainage networks extracted from DEM
We present a hierarchical method to build a pyramid of drainage networks. High-level drainage networks are generated from the originals iteratively. Each level is obtained by pruning the outer reaches and merging related sub-basins. Topographical attributes are conserved for hydrological simulations across levels. We speed up the digital map display using each pyramid level in the proper scale range.
hierarchical pyramid drainage network digital elevation model hortonstrahler order river basin