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Flow accumulation from the Hydrologic Derivatives for Modeling and Analysis (HDMA) database -- Asia


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Verdin, K.L., 2017, Hydrologic Derivatives for Modeling and Applications (HDMA) database: U.S. Geological Survey data release,


This dataset contains the Flow Accumulation (FA) grid for the Asian continent from the Hydrologic Derivatives for Modeling and Analysis (HDMA) database. The DEM data were developed and distributed by processing units. There are 19 processing units for Asia. The distribution files have the number of the processing unit appended to the end of the zip file name (e.g. contains the DEM data for unit 3-2). The HDMA database provides comprehensive and consistent global coverage of raster and vector topographically derived layers, including raster layers of digital elevation model (DEM) data, flow direction, flow accumulation, slope, and compound topographic index (CTI); and vector layers of streams and catchment boundaries. [...]


Point of Contact :
U.S. Geological Survey, Southwest Region
Originator :
Kristine L. Verdin
Metadata Contact :
Kristine L Verdin
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey

Attached Files

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as_fa1.jpg thumbnail 190.53 KB image/jpeg
as_fa2.jpg thumbnail 70.94 KB image/jpeg 449.95 MB application/zip 782.05 MB application/zip 292.65 MB application/zip 273.37 MB application/zip 235.44 MB application/zip 314.58 MB application/zip 12.12 MB application/zip 133.51 MB application/zip 46.26 MB application/zip 120.11 MB application/zip 102.55 MB application/zip 128.4 MB application/zip 7.52 MB application/zip 169.86 MB application/zip 516.66 MB application/zip 558.41 MB application/zip 179.28 MB application/zip 389.92 MB application/zip 310.31 MB application/zip
Original FGDC Metadata

13.49 KB application/fgdc+xml


This dataset contains the flow accumulation grid for the Asian continent from the Hydrologic Derivatives for Modeling and Analysis (HDMA) database. This dataset is appropriate for use in continental-scale modeling effort. The Pfafstetter codes provide topological information that can be useful for upstream and downstream tracing.
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  • USGS Colorado Water Science Center



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