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Hydrography90m is a high-resolution global hydrographic dataset derived from the MERIT Hydro digital elevation model at 3 arc-second (~90 m at the equator). It provides a globally seamless, standardized representation of stream channels and drainage basins with associated topographic and topological attributes for flow routing and network analysis. Products include stream and basin layers, sub-catchments linked to stream segments, stream order and slope metrics, flow-routing topology via unique segment identifiers, and tiled raster/vector layers suitable for large-scale hydrology, geomorphology, ecology, and environmental modeling applications.
Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB)
Global stream channel network with unique segment identifiers and topology attributes.
Global drainage basin delineations derived from flow routing.
Sub-catchment polygons linked to individual stream segments.
Upstream/downstream connectivity and routing attributes for stream segments.
Stream order metrics computed for the network.
Slope metrics computed along stream segments.
In-stream and among-stream distance measures for network analysis.
Derivation of hydrographic networks and basins from MERIT Hydro DEM (~90 m) using hydrologic conditioning, flow routing, and network extraction
Computation of stream topology, stream order, and stream slope metrics for global hydrographic analysis
Hydrography90m website (project landing page)
Project website for Hydrography90m with documentation and navigation to layers and downloads.
Overview of Hydrography90m layers available for download.
Scripted procedure to download tiled raster and vector layers of Hydrography90m.
Institutional dataset record and distribution entry for Hydrography90m hosted by IGB (FRED).
Hydrography90m: A new high-resolution global hydrographic dataset