Metadata for Montana Hydrography Framework (NHD), 2012 Metadata for Montana Hydrography Framework (NHD), 2012

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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: 12/01/2012

Title: Montana Hydrography Framework (NHD), 2012

Publication place: Helena, Montana
Publisher: Montana State Library

Online linkage: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Hydrography/Historic/MT_Hydrography20121201.zip

Larger Work Citation:

Title: Montana Hydrography Framework (National Hydrography Dataset)
Online linkage: https://mslservices.mt.gov/Geographic_Information/Data/DataList/datalist_Details.aspx?did={db6c41bd-1f29-48ab-b4aa-2c1890f317e6}

Abstract:

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. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.

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.

Supplemental information:

http://usgs-mrs.cr.usgs.gov/stewweb/index.html and http://nhd.usgs.gov/ for detailed infor mation on history, process and attributes. USER GUIDE - http://nhd.usgs.gov/userguide.html

Time period of content:

Calendar date: 2012
Currentness reference: publication date

Status:

Progress: In work
Maintenance and update frequency: Irregular

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:

Earth Science Information Center, U.S. Geological Survey
507 National Center
Reston, VA 20192
Telephone: 1 888 ASK USGS
E-Mail: ask@usgs.gov
Contact instructions:: In addition to the address above there are other ESIC offices throughout the country. A full list of these offices is at URL: http://mapping.usgs.gov/esic/esic_index.html

Data set credit: See dataset specific metadata.

Data Quality Information:

Logical consistency report:

Points, nodes, lines, and areas conform to topological rules. Lines intersect only at nodes, and all nodes anchor the ends of lines. Lines do not overshoot or undershoot other lines where they are supposed to meet. There are no duplicate lines. Lines bound areas and lines identify the areas to the left and right of the lines. Gaps and overlaps among areas do not exist. All areas close.

Completeness report:

The completeness of the data reflects the content of the sources, which most often are the published USGS topographic quadrangle and/or the USDA Forest Service Primary Base Series (PBS) map. The USGS topographic quadrangle is usually supplemented by Digital Orthophoto Quadrangles (DOQs). Features found on the ground may have been eliminated or generalized on the source map because of scale and legibility constraints. In general, streams longer than one mile (approximately 1.6 kilometers) were collected. Most streams that flow from a lake were collected regardless of their length. Only definite channels were collected so not all swamp/marsh features have stream/rivers delineated through them. Lake/ponds having an area greater than 6 acres were collected. Note, however, that these general rules were applied unevenly among maps during compilation. Reaches codes are defined on all features of type stream/river, canal/ditch, artificial path, coastline, and connector. Waterbody reach codes are defined on all lake/pond and most reservoir features. Names were applied from the GNIS database. Detailed capture conditions are provided for every feature type in the Standards for National Hydrography Dataset available online through http://mapping.usgs.gov/standards/.
This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be found in the NHDMetadata table.

Lineage:

Process step:: The processes used to create and maintain high-resolution NHD data can be found in the table called "NHDMetadata". Because NHD data can be downloaded using several user-defined areas, the process descriptions can vary for each download. The NHDMetadata table contains a list of all the process descriptions that apply to a particular download. These process descriptions are linked using the DuuID to the NHDFeatureToMetadata table which contains the com_ids of all the features within the download. In addition, another table, the NHDSourceCitation, can also be linked through the DuuID to determine the sources used to create or update NHD data.
Process step:: Data downloaded from USGS ftp site of prepackaged state extracts.
Process step:: Used the NHD data extract tool to load data into empty Montana State Plane Coordinate System geodatabase. Used USGS tool to rebuild geometric network.
Process step: Flow table populated using tool provided by USGS, BuildFlow.
Process step:: Opened GDB, deleted the flowline geometric network. Compacted the geodatabase.

Spatial Data Organization Information:

Point and vector object information:

SDTS object type: Entity point

SDTS object count: 17322

SDTS object type: Complete chain

SDTS object count: 1133425

SDTS object type: Complete chain

SDTS object count: 4220

SDTS object type: GT-polygon composed of chains

SDTS object count: 3935

SDTS object type: GT-polygon composed of chains

SDTS object count: 208456

SDTS object type: GT-polygon composed of chains

SDTS object count: 0

SDTS object type: Complete chain

SDTS object count: 0

SDTS object type: Entity point

SDTS object count: 11139

SDTS object type: Entity point

SDTS object count: 1130433

Entity and Attribute Information:

Entity type label: NHDPoint

Entity type definition:

NHDPoints contain points representing NHD hydrographic landmark features.

Entity type label: NHDFlowline

Entity type definition:

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

Entity type label: NHDLine

Entity type definition:

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

Entity type label: NHDArea

Entity type definition: NHDAeas are areal hydrographic landmark features.

Entity type label: NHDWaterbody

Entity type definition:

NHDWaterbodies contain regions representing areal NHD hydrographic waterbody features.

Entity type label: NHDAreaEventFC

Entity type label: NHDLineEventFC

Entity type label: NHDPointEventFC

Entity type definition: Locations of dams, stream gauges, water quality locations

Entity type label: HYDRO_NET_Junctions

Distribution Information:

Distributor:

Montana State Library
PO BOX 201800
HELENA, MT 59620-1800
Telephone: 1-406-444-5354
TDD/TTY telephone: 1-406-444-4799
Fax: 1-406-444-0266
E-Mail: geoinfo@mt.gov

Resource description: Downloadable Data

Distribution liability:

Standard order process:

Digital form:

Metadata Reference Information:

Metadata date: 12/06/2012

Metadata contact:

Montana State Library
PO BOX 201800
HELENA, MT 59620-1800
Telephone: 1-406-444-5354
TDD/TTY telephone: 1-406-444-4799
Fax: 1-406-444-0266
E-Mail: geoinfo@mt.gov