Description

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This cached map service dataset represents the National Hydrography Dataset (NHD) of Washington State (data last updated December, 2016). This dataset has been adopted as the Washington State hydrography standard. The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all.This high-resolution NHD, generally developed at 1:24,000/1:4,800 scale. Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.

Dataset Attributes

  • OBJECTID
    Number
  • Shape
    Number
  • Permanent_Identifier
    Text
    {"value"=>"165538180", "count"=>1} (), {"value"=>"{48186A13-8000-45FA-ADE0-B40C8CF6C95E}", "count"=>1} (), {"value"=>"165793888", "count"=>1} (), {"value"=>"165793885", "count"=>1} (), {"value"=>"{1D08C0CD-A1E9-4E98-A7F1-770C57687047}", "count"=>1} (), {"value"=>"165794018", "count"=>1} (), {"value"=>"{55DA3158-E66B-4AD4-AA52-1E397847F3D3}", "count"=>1} (), {"value"=>"166407577", "count"=>1} (), {"value"=>"166407549", "count"=>1} (), {"value"=>"166407586", "count"=>1} ()
  • FDate
    Date
    1330025796000 to 1480982400000
  • Resolution
    Number
  • GNIS_ID
    Text
  • GNIS_Name
    Text
  • LengthKm
    Number
    0.003 to 30.51404355
  • ReachCode
    Text
  • FlowDir
    Number
  • WBArea_Permanent_Identifier
    Text
    {"value"=>"53700", "count"=>4} ()
  • FType
    Number
    566 to 566
  • FCode
    Number
  • MainPath
    Number
  • InNetwork
    Number
    {"value"=>"Yes", "count"=>4098, "code"=>1} ()
  • VisibilityFilter
    Number
  • Enabled
    Number
    {"value"=>"True", "count"=>5745, "code"=>1} ()
  • StreamOrder
    Number
  • Shape_Length
    Number

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