Data Catalog

• Federal

  Hydrologic landscape regions of the United States

  Department of the Interior —

  Hydrologic landscape regions (HLRs) in the United States were delineated by using geographic information system (GIS) tools and statistical methods including...

  • XML
  • XML
• Federal

  Attributes for NHDPlus Catchments (Version 1.1): Level 3 Nutrient Ecoregions, 2002

  Department of the Interior —

  This data set represents the area of each level 3 nutrient ecoregion in square meters, compiled for every catchment of NHDPlus for the conterminous United States. The...

  • XML
  • XML

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