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Nautical Publication Information Areas USACE IENC

2025 - Homeland Infrastructure Foundation Level Data HIFLD


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API
REST: https://mapservices.pasda.psu.edu/server/rest/services/pasda/HIFLD_FEMA_PA/MapServer
WMS: https://mapservices.pasda.psu.edu/server/services/pasda/HIFLD_FEMA_PA/MapServer/WMSServer?request=GetCapabilities&service=WMS
ADDITIONAL RESOURCES
n/a
ABSTRACT
Used to relate additional nautical information or publications to the data. For example, geographic areas may be defined that relate to sections in Sailing Directions (Coast Pilots). The USACE IENCs coverage area consists of 7,260 miles across 21 rivers primarily located in the Central United States. IENCs apply to inland waterways that are maintained for navigation by USACE for shallow-draft vessels (e.g., maintained at a depth of 9-14 feet, dependent upon the waterway project authorization). Generally, IENCs are produced for those commercially navigable waterways which the National Oceanic and Atmospheric Administration (NOAA) does not produce Electronic Navigational Charts (ENCs). However, Special Purpose IENCs may be produced in agreement with NOAA.