# Source: USGS Watershed Boundary Dataset (WBD)
# Type: vector
# Catalog: Manual
# Created for: CBGB benchmark problems

source:
  id: usgs-wbd
  name: USGS Watershed Boundary Dataset (WBD)
  type: vector
  url: https://www.usgs.gov/national-hydrography/watershed-boundary-dataset
  description: >
    The Watershed Boundary Dataset (WBD) defines the areal extent of surface
    water drainage for the United States using a hierarchical system of
    hydrologic units (HUs). The dataset uses a standardized coding system
    (HUC - Hydrologic Unit Code) with nested levels from 2-digit regions
    down to 12-digit subwatersheds. The WBD is part of the National
    Hydrography Dataset (NHD) and is maintained as a seamless national
    coverage. It is the official USGS watershed delineation for the US.
  provider: United States Geological Survey (USGS)
  license: public-domain
  metadata:
    connector_id: null
    tags:
    - Watersheds
    - Hydrology
    - United States
    - Vector
    - USGS
    - HUC
    - NHD
    dataset:
      tier: 1
      thematic_group: Hydrology & Water
      format: geopackage
      crs: EPSG:4326
      fields:
      - id: huc2
        description: 2-digit hydrologic region code
        dtype: string
      - id: huc4
        description: 4-digit hydrologic subregion code
        dtype: string
      - id: huc6
        description: 6-digit hydrologic basin code
        dtype: string
      - id: huc8
        description: 8-digit hydrologic subbasin code
        dtype: string
      - id: huc10
        description: 10-digit hydrologic watershed code
        dtype: string
      - id: huc12
        description: 12-digit hydrologic subwatershed code
        dtype: string
      - id: name
        description: Hydrologic unit name
        dtype: string
      - id: areasqkm
        description: Area in square kilometers
        dtype: float64
      - id: states
        description: State(s) containing the hydrologic unit
        dtype: string
      temporal:
        range: 2017-01-01/..
        frequency: static
        type: snapshot
        default_range: latest
      quality:
        methodology: >
          Delineated from elevation data and verified against hydrographic
          features. Maintained through a national stewardship program with
          state and federal partners. Conforms to Federal Standards and
          Procedures for the National Watershed Boundary Dataset (FGDC).
        accuracy: >
          Boundaries meet National Map Accuracy Standards. Positional accuracy
          varies by source DEM resolution (typically 10m or better for CONUS).
        coverage: United States (including territories)
      layout:
        type: single_file
      access:
        type: http
        url: https://prd-tnm.s3.amazonaws.com/StagedProducts/Hydrography/WBD/National/GPKG/WBD_National_GPKG.zip
        notes: >
          Available from The National Map (TNM) download service. Multiple
          formats: GeoPackage, Shapefile, FileGDB. Also available by HUC-2
          region. Web services at https://hydro.nationalmap.gov/arcgis/rest/services/.
          GEE has HUC04 level as USGS/WBD/2017/HUC04.
      original_source_url: https://www.usgs.gov/national-hydrography/watershed-boundary-dataset
      homepage: https://www.usgs.gov/national-hydrography/watershed-boundary-dataset
      gee_asset_id: USGS/WBD/2017/HUC04
      cbgb_problems:
      - FRC_1
      - FRC_2
      - FRC_3
      - FRC_5