Metadata for Montana Hydrography Framework (National Hydrography Dataset) Metadata for Montana Hydrography Framework (National Hydrography Dataset)

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Identification Information:

Citation:

Originator: U.S. Geological Survey
Originator: Montana State Library
Originator:: U.S. Environmental Protection Agency, USDA Forest Service, and other Federal, State and local partners
Publication date: 12/27/2023
Title: Montana Hydrography Framework (National Hydrography Dataset)
Online linkage: https://msl.mt.gov/geoinfo/water_information_system/nhd_high_resolution_data_download
Online linkage: https://msl.mt.gov/geoinfo/water_information_system/nhd_high_resolution_data_download

Abstract:

This is the final snapshot of the NHD, as it has been retired by the USGS and will be replaced by the USGS 3D Hydrography Program. The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 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. This dataset is NHD Model version 2.2.1. See Model Diagram at: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Hydrography.

Purpose:

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 dataset is NHD Model version 2.3.1. See Model Diagram at: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Hydrography.

Time period of content:

Calendar date: 12/27/2023
Currentness reference: publication date

Status:

Progress: In progress
Maintenance and update frequency: Irregular, currently ongoing

Access constraints: None

Use constraints:

DISCLAIMER: The Montana State Library Geographic Information Services provides this product/service for informational purposes only. The Library did not produce it for, nor is it suitable for legal, engineering, or surveying purposes. Consumers of this information should review or consult the primary data and information sources to ascertain the viability of the information for their purposes. The Library provides these data in good faith but does not represent or warrant its accuracy, adequacy, or completeness. In no event shall the Library be liable for any incorrect results or analysis; any direct, indirect, special, or consequential damages to any party; or any lost profits arising out of or in connection with the use or the inability to use the data or the services provided. The Library makes these data and services available as a convenience to the public, and for no other purpose. The Library reserves the right to change or revise published data and/or services at any time.

Point of contact:

Montana State Library
PO Box 201800
Helena, Montana 59620
Telephone: 406.444.5354
E-Mail: geoinfo@mt.gov

Data set credit:

USGS, Montana State Library, and other contributors and base sources. See dataset feature-level metadata (tables: NHD Metadata, NHD Source Citation, and NHDFeatureToMetadata via key Meta_ProcessID; feature class to NHDFeatureMetadata via key Permenant_Identifier)

Entity and Attribute Information:

Entity type label: NHDPoint

Entity type definition:

NHDPoint contains points representing NHD hydrographic landmark features.

Attribute label: Ftype

Attribute definition:: NHDPoint: Inundation Area (403); SeaOcean (445); Submerged Stream (461); CanalDitch (336); Levee (568); StreamRiver (460); Hazard Zone (373); Wash (484); BayInlet (312); Rapids (431); Foreshore (364); Bridge (318); Area of Complex Channels (537); Lock Chamber (398); Special Use Zone (454); Spillway (455); Flume (362); DamWeir (343); Water IntakeOutflow (485); Area to be Submerged (307)

Entity type label: NHDFlowline

Entity type definition:

NHDFlowlines consist of routes that make up a linear surface water drainage network.

Attribute label: Ftype

Attribute definition:: Underground Conduit (420) StreamRiver (460) Pipeline (428) ArtificialPath (558) CanalDitch (336) Connector (334) Coastline (566)

Entity type label: NHDLine

Entity type definition:

NHDLines represent linear NHD hydrographic landmark features used for cartographic representation.

Attribute label: Ftype

Attribute definition:: Tunnel (478); Bridge (318); Lock Chamber (398); Wall (483); Sounding Datum Line (503); Levee (568); Gate (369); Flume (362); Waterfall (487); Reef (434); Special Use Zone Limit (533); SinkRise (450); Rapids (431); DamWeir (343); Nonearthen Shore (411)

Entity type label: NHDArea

Entity type definition: NHDAeas are areal hydrographic landmark features.

Attribute label: Ftype

Attribute definition:: Inundation Area (403); SeaOcean (445); Submerged Stream (461); CanalDitch (336); Levee (568); StreamRiver (460); Hazard Zone (373); Wash (484); BayInlet (312); Rapids (431); Foreshore (364); Bridge (318); Area of Complex Channels (537); Lock Chamber (398); Special Use Zone (454); Spillway (455); Flume (362); DamWeir (343); Water IntakeOutflow (485); Area to be Submerged (307)

Entity type label: NHDWaterbody

Entity type definition:

NHDWaterbodies contain regions representing areal NHD hydrographic waterbody features.

Attribute label: Ftype

Attribute definition:: Playa (361); Ice Mass (378); SwampMarsh (466); Estuary (493); LakePond (390); Reservoir (436)

Entity type label: NHDAreaEventFC

Entity type definition:

Area event must be tied to a NHDWaterbody. They cannot be linked to a linear or point feature. Area events are built into the NHD Model but are not accepted back into the National Database. They are meant to be used on an individual basis.

Entity type label: NHDLineEventFC

Entity type definition:

Linear Events are used to attach information about a flowline segment to the NHD. Linear events are built into the NHD Model but are not accepted back into the National Database. They are meant to be used on an individual basis. They also need a from and to location and a reachcode.

Entity type label: NHDPointEventFC

Entity type definition:

Point events are tied to a specific location on a stream network by a reachcode and a measure. While several types of Point Events are accepted back into the National Database, additional Point Event Types may be used on an individual basis. Locations of dams, stream gauges, water quality locations

Entity type label: HYDRO_NET_Junctions

Entity type definition:

The feature classes called Hydro Net and Hydro Net Junction contain the geometric network for the Hydrography Dataset with assigned flow direction for flowline features. Hydro_Net is an ESRI utility network, and Hydro Net Junction contains points for all flowline start and end nodes. These are produced when the NHD is extracted from the National Database and the network is given the name Hydro Net.

Entity type label: ExternalCrosswalk (table)

Entity type definition:

Contains associations of Permanent _Identifiers to external source identifiers (1:M)

Entity type label: NHD FCode (table)

Entity type definition:

Five-digit integer value comprised of the feature type and the combinations of characteristcs and values

Entity type label: NHDFeatureToMetadata (table)

Entity type definition:

In the NHD geodatamodel, feature-level metadata information is included in three tables: NHDFeatureToMetadata, NHDMetdata, and NHDSourceCitation. The NHDFeatureToMetadata table links the features to their instances of metadata. The NHDMetadata table contains the general metadata characteristics for each collection of features. The NHDSourceCitation table details the source associated with each metadata instance.

Entity type label: NHDMetadata (table)

Entity type definition:

Entity type label: NHDSourceCitation (table)

Entity type definition:

Entity type label: NHDFlow (table)

Entity type definition:

the NHDFlow table provides feature to feature flow information for the NHDFlowline feature class. This flow table data is redundant with the network flow navigation available in the geometric network in both the personal and file geodatabase downloads. The flow table is intended to support interoperability with applications outside of ESRI geodatabase solutions.

Entity type label: NHDFlowlineVAA (table)

Entity type definition:

hThe NHD Value Added Attributes are computed from the NHDFlow table and assigned to each drainage feature in the stream network. The values currently are not populated but will be in the future; they are essential to NHD Plus.

Entity type label: NHD Processing Parameters (table)

Entity type definition: