Metadata Document

ISO-19139 Metadata

Metadata Information

Metadata language: eng
Metadata character set: utf8
Last update: 2024-10-25
Metadata maintenance:
Update frequency: asNeeded
Metadata contact:
Role: pointOfContact
Individual's name: John Dubberley
Organization's name: Waterborne Commerce Statistics Center, U.S. Army Corps of Engineers
Contact's position: Domestic Project Manager
Contact information:
Phone:
Voice: (503) 940-8802
Fax: (504) 862-1423
Address:
e-mail address: John.R.Dubberley@usace.army.mil
Scope of the data described by the metadata: service
Scope name: service
Name of the metadata standard used: ISO 19139 Geographic Information - Metadata - Implementation Specification
Version of the metadata standard: 2007
Metadata identifier: ECB376C8-310D-490C-8930-996E69412938
Title: Waterway Networks
Date:
Reference date - creation: 2023-01-01
Date:
Reference date - publication: 2024-10-25
Cited responsible party:
Role: pointOfContact
Individual's name: John Dubberley
Organization's name: Waterborne Commerce Statistics Center, U.S. Army Corps of Engineers
Contact's position: Domestic Project Manager
Contact information:
Phone:
Voice: (503) 940-8802
Fax: (504) 862-1423
Address:
e-mail address: John.R.Dubberley@usace.army.mil
The National Waterway Network (NWN) is a geographic database of navigable waterways and channels in and around the United States, for analytical studies of navigation performance, for compiling commodity flow statistics, and for mapping purposes. The NWN is comprised of a link database and a node database. Links are line strings, which consist of beginning and end points (nodes) with intermediate vertices (shape points). Links represent either actual shipping lanes (i.e., channels, Intracoastal Waterways, sea lanes, rivers) or serve as representative paths in open water (where no defined shipping paths exist). Nodes may represent physical entities such as river confluence's, ports/facilities, and intermodal terminals, USACE nodes, or may be inserted for analytical purposes (i.e., to facilitate routing).The National Waterway Network (NWN) “is comprised of a link database and a node database. Nodes may represent physical entities such as river confluence's, ports/facilities, and intermodal terminals, USACE nodes, or may be inserted for analytical purposes (i.e., to facilitate routing).”U.S. Army Corps of Engineers (USACE)
Role: originator
Individual's name: John Dubberley
Organization's name: Waterborne Commerce Statistics Center, U.S. Army Corps of Engineers
Contact's position: Domestic Project Manager
Contact information:
Phone:
Voice: (503) 940-8802
Fax: (504) 862-1423
Address:
e-mail address: John.R.Dubberley@usace.army.mil
Update frequency: asNeeded
Keyword type not provided
Keywords: inland waters, oceans, transportation, geospatial, HIFLD, Feature Service, SDI, NSDI, Open Data, FGDC, Emergency Preparedness, Disaster Planning, Infrastructure
General constraints:
Limitations of use: Major update sources (NHD and NCF) are updated regularly (NHD on monthly basis and NCF on weekly or more frequent basis). NWN links were updated periodically. The final update results only represent information at the time when the update datasets were lastly downloaded or modified as required by IWR. In this project, NHD datasets were updated on October 1, 2019 by USGS and NWN and NCF datasets were updated on June 26, 2019 and February 7, 2020 by USACE, respectively. In addition, six NWN links were added as required by IWR on April 29, 2020 and May 5, 2020. From NHD: None; however, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data.From NCF: None. From NWN: Certain fields in the "NWN_Update" attribute table are obtained from original NWN link dataset by linking "LINKNUM". Some of these original NWN fields don't match the lengths of the measures in the linear referencing system (LRS), where measures are stored within the route lines themselves and individual links are plotted using the route measures and "MIN_MEAS" and "MAX_MEAS". In the final deliverable, we use projected Geographic Coordinate System (GCS) with North American Datum of 1983 (GCS North American 1983 (WKID: 4269)). It should be noted that NWN links were updated under two projection systems appropriate for calculating distances by region, including: “North_America_Equidistant_Conic” and “Hawaii Albers Equal Area Conic” to ensure the accuracy of distance calculations within LRS. The measures used in the LRS are based on these linear distances. In addition, for Region 0 – global open water links that cannot be projected correctly into a planar coordinate system, the measures (in miles) were calculated based on geodetic distance.
Legal constraints:
Access constraints: otherRestrictions
Other constraints: Other Constraints
Legal constraints:
Use constraints: otherRestrictions
Other constraints: Other Constraints
Feature Service
Geographic element:
Bounding rectangle:
West longitude: -179.3121
East longitude: 179.13519
North latitude: 72.19972
South latitude: -53
Temporal element:
Temporal extent:
2023-01-01T00:00:002023-12-31T00:00:00
loose

Distribution Information

Transfer options:
Online distribution information:
Online location: https://services7.arcgis.com/n1YM8pTrFmm7L4hs/arcgis/rest/services/Waterway_Networks/FeatureServer
Function performed: webService