Geospatial Representation of River Channels

摘要: A geographic information system (GIS) approach for creating a three-dimensional (3D) topographic data set straight or meandering river channels is presented. As input, the requires channel banklines, an initially arbitrary centerline, and of (x,y,z) bathymetry points. curvilinear orthogonal s,n -coordinate that references along transverse to flow in used. The methodology includes locating centerline thalweg then using it as reference assigning -coordinates bathymetric data. resulting s,n,z are used create square mesh, FishNet, this FishNet transformed back original x,y,z get flow-oriented 3D mesh. mesh network lines (cross sections) parallel (profile lines). output thus provides representation geometry ...