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Inland Electronic Navigational Charts
The Inland Electronic Navigational Charts (IENC) dataset is updated bi-monthly by the US Army Corps (USACE)/Army Geospatial Center (AGC), and part of U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). There is a partial delivery on the 1st and 15th business day of a month. If there is a need for a special chart delivery, occasionally there will be updates outside of the delivery cycle. The charts with data changes are released either as new editions or updates to existing IENCs on a regular delivery cycle. These IENCs were developed from available data used in maintenance of Navigation channels. These vector data, that make up the charts, can be downloaded as a geodatabase here: https://ienccloud.us/ienc/products/files/U37/ienc_master_dataset_gdb/USACE_IENC_Master_Service_gdb.zip. In addition, web mapping services of the feature classes/datasets can be found here: https://ienccloud.us/arcgis/rest/services/IENC_Feature_Classes. Users of these IENCs should be aware that some features and attribute information could have significant inaccuracies due to changing waterway conditions, inaccurate source data, or approximations introduced during chart compilation. Caution is urged in use of these IENCs or derived products for navigation planning or operation, or any decisions pertaining to or affecting safety of vessel operation. Only charts downloaded from the USACE chart server, https://ienccloud.us, and used in an Electronic Chart Display Information System (ECDIS) or Electronic Chart System (ECS), or official government chart books are suitable for navigation.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{
"fn": "United States Army Corp of Engineers (USACE)",
"@type": "vcard:Contact",
"hasEmail": "mailto:dale.k.dodson@usace.army.mil"
}
|
| describedByType | application/octet-steam |
| description | The Inland Electronic Navigational Charts (IENC) dataset is updated bi-monthly by the US Army Corps (USACE)/Army Geospatial Center (AGC), and part of U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). There is a partial delivery on the 1st and 15th business day of a month. If there is a need for a special chart delivery, occasionally there will be updates outside of the delivery cycle. The charts with data changes are released either as new editions or updates to existing IENCs on a regular delivery cycle. These IENCs were developed from available data used in maintenance of Navigation channels. These vector data, that make up the charts, can be downloaded as a geodatabase here: https://ienccloud.us/ienc/products/files/U37/ienc_master_dataset_gdb/USACE_IENC_Master_Service_gdb.zip. In addition, web mapping services of the feature classes/datasets can be found here: https://ienccloud.us/arcgis/rest/services/IENC_Feature_Classes. Users of these IENCs should be aware that some features and attribute information could have significant inaccuracies due to changing waterway conditions, inaccurate source data, or approximations introduced during chart compilation. Caution is urged in use of these IENCs or derived products for navigation planning or operation, or any decisions pertaining to or affecting safety of vessel operation. Only charts downloaded from the USACE chart server, https://ienccloud.us, and used in an Electronic Chart Display Information System (ECDIS) or Electronic Chart System (ECS), or official government chart books are suitable for navigation. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Open Data Catalog",
"mediaType": "placeholder/value",
"description": "Web page to view and download dataset. The file download formats available include: ESRI File Geodatabase or Shapefile, GeoPackage, Comma-Seperated Values (CSV), Microsoft Excel, GeoJSON, KML, Feature Collection, and SQLite Geodatabase.",
"downloadURL": "https://doi.org/10.21949/1522133",
"describedByType": "application/octet-steam"
},
{
"@type": "dcat:Distribution",
"title": "ArcGIS REST Services Directory Map Server (WMS)",
"mediaType": "placeholder/value",
"description": "complies with OGC WMS Map Service for visualizing geospatial information",
"downloadURL": "https://doi.org/10.21949/1528017",
"describedByType": "application/octet-steam"
}
]
|
| identifier | Inland Electronic Navigational Charts |
| isPartOf | National Transportation Atlas Database |
| issued | 2020-07-01T00:00:00.000+00:00 |
| keyword |
[
"NTAD",
"National Transportation Atlas Database",
"National",
"Transportation",
"Atlas",
"Database",
"vector",
"Inland Electronic Navigational Charts",
"Marine",
"Maritime",
"IENC",
"US Inland ENC",
"S Inland ENC 2.3.6",
"Electronic",
"Navigational",
"Charts",
"S-57",
"Coast Guard",
"Transportation Infrastructure",
"AGC",
"Army Geospatial Center",
"USACE",
"USCG",
"HIFLD",
"NGDA",
"National Geospatial Data Asset",
"Transportation Theme",
"NGDAID150",
"USA",
"National",
"Continental United States"
]
|
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2025-11-26T00:00:00.000+00:00 |
| publisher |
{
"name": "United States Army Corp of Engineers (USACE)",
"@type": "org:Organization"
}
|
| rights | otherRestrictions |
| spatial | 180.0,-90.0,-180.0,90.0 |
| title | Inland Electronic Navigational Charts |
