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Attributes for NHDPlus Version 2.1 Flowlines for the Conterminous United States: Mean Flow Path Distance to NHDPlus Version 2.1 Streams

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2023-08-02T00:00:00Z
This dataset describes mean flow path distance, in meters, to flowlines from every NHDPlus version 2.1 (NHDv2) flowline in every catchment. A National flow distance raster utilizes NHDPlus Version 2.1 flow direction rasters to compute a national flow path distance raster. For the purposes of this dataset, NHDPlus Version 2 catchments were overlaid to compute a mean flow path distance to flowline for each flowline catchment.

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