TY - JOUR A1 - Wang, L. A1 - Ai, T. T1 - THE COMPARISON OF DRAINAGE NETWORK EXTRACTION BETWEEN SQUARE AND HEXAGONAL GRID-BASED DEM JO - Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. J1 - ISPRS-Archives VL - XLII-4 SP - 687 EP - 692 Y1 - 2018/09/19 PB - Copernicus Publications SN - 2194-9034 UR - https://isprs-archives.copernicus.org/articles/XLII-4/687/2018/ L1 - https://isprs-archives.copernicus.org/articles/XLII-4/687/2018/isprs-archives-XLII-4-687-2018.pdf DO - 10.5194/isprs-archives-XLII-4-687-2018 ER -