Name: Subwatersheds (HUC-12)

Display Field: NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" “Standard” (http://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level) for the entire United States. Some areas may also include additional subdivisions representing the 14- and 16-digit hydrologic unit (HU). At a minimum, the HUs are delineated at 1:24,000-scale in the conterminous United States, 1:25,000-scale in Hawaii, Pacific basin and the Caribbean, and 1:63,360-scale in Alaska, meeting the National Map Accuracy Standards (NMAS). Higher resolution boundaries are being developed where partners and data exist and will be incorporated back into the WBD. WBD data are delivered as a dataset of polygons and corresponding lines that define the boundary of the polygon. WBD polygon attributes include hydrologic unit codes (HUC), size (in the form of acres and square kilometers), name, downstream hydrologic unit code, type of watershed, non-contributing areas, and flow modifications. The HUC describes where the unit is in the country and the level of the unit. WBD line attributes contain the highest level of hydrologic unit for each boundary, line source information and flow modifications.

Copyright Text: Funding for the Watershed Boundary Dataset (WBD) was provided by the USDA-NRCS, USGS and EPA along with other federal, state and local agenciesies. Representatives from many agencies contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the WBD Standards. Acknowledgment of the originating agencies would be appreciated in products derived from these data. See dataset specific metadata for further information

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Supported Query Formats: JSON, geoJSON, PBF

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Supports Advanced Queries: true

Supports Statistics: true

Has Labels: true

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -179.229655487448
YMin: -14.6101927627387
XMax: 179.856674735386
YMax: 71.4395725901531
Spatial Reference: 4269  (4269)

Drawing Info:

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Labeling Info:
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Label Expression: [HU_12_NAME]
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Advanced Query Capabilities:

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Supports OrderBy: true
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Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
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Supports Query Analytic: true
Supports Query With Current User: true

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HasM: false

Has Attachments: false

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Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: ObjectID )
• TNMID ( type: esriFieldTypeString, alias: TNMID, length: 40 )
• METASOURCEID ( type: esriFieldTypeString, alias: MetaSourceID, length: 40 )
• SOURCEDATADESC ( type: esriFieldTypeString, alias: SourceDataDesc, length: 100 )
• SOURCEORIGINATOR ( type: esriFieldTypeString, alias: SourceOriginator, length: 130 )
• SOURCEFEATUREID ( type: esriFieldTypeString, alias: SourceFeatureID, length: 40 )
• LOADDATE ( type: esriFieldTypeDate, alias: LoadDate, length: 8 )
• REFERENCEGNIS_IDS ( type: esriFieldTypeString, alias: ReferenceGNIS_IDs, length: 50 )
• AREAACRES ( type: esriFieldTypeDouble, alias: AreaAcres )
• AREASQKM ( type: esriFieldTypeDouble, alias: AreaSqKm )
• STATES ( type: esriFieldTypeString, alias: States, length: 50 )
• HUC12 ( type: esriFieldTypeString, alias: HUC12, length: 12 )
• NAME ( type: esriFieldTypeString, alias: Name, length: 120 )
• HUTYPE ( type: esriFieldTypeString, alias: HUType, length: 1 , Coded Values: [S: Standard] , [C: Closed Basin] , [F: Frontal] , ...5 more... )
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• TOHUC ( type: esriFieldTypeString, alias: ToHUC, length: 16 )
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• SHAPE.LEN ( type: esriFieldTypeDouble, alias: SHAPE.LEN )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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