NOAA's Electronic Navigational Charts (NOAA ENCs) have been developed to support the marine transportation infrastructure and coastal management. The NOAA ENCs are in S-57, a data standard developed by the International Hydrographic Organization (IHO) to be used for the exchange of digital hydrographic data. NOAA ENCs can be used in Geographic Information Systems, (GIS) allowing for broader public access. Many GIS's, however cannot read an ENC's native S-57 format to address this problem. NOAA's ENC Direct to GIS web portal provides comprehensive access to display, query, and download all available large scale NOAA ENC data in a variety of GIS/CAD formats for non-navigational purposes using Internet mapping service technology. Nautical chart features contained within an NOAA ENC provide a detailed representation of the U.S. coastal and marine environment. This data includes coastal topography, bathymetry, landmarks, geographic place names and marine boundaries. Features in an NOAA ENC are limited in that they only represent the geographic region that is depicted in that particular NOAA ENC. By aggregating nautical features from all NOAA ENCs in the creation of GIS data, a contiguous depiction of the U.S coastal and marine environment is achieved.

The NOAA ENC data are in International Hydrographic Organization (IHO) S-57 format, which is the data standard for the exchange of digital hydrographic data. Nautical chart features contained within a NOAA ENC provide a detailed representation of the U.S. coastal and marine environment. This data includes coastal topography, bathymetry, landmarks, geographic place names, and marine boundaries. Features in a NOAA ENC are limited in that they only represent the geographic region depicted in that particular ENC. Aggregating nautical features from all NOAA ENCs in the creation of GIS data results in a contiguous depiction of the U.S. coastal and marine environment.To learn more about S-57, visit the IHO website.For questions or comments, contact us.File naming conventions and scale bandsENC Direct to GIS data is organized by scale band, and there are six scale bands available: Overview, General, Coastal,Approach, Harbour, and Berthing.SCALE RATIOS:Overview scale band consists of ENC files with a scale band of smaller than 1:1,500,000. General scale band consists of ENC files with a scale band from 1:600,001 – 1:1,500,000. Coastal scale band consists of ENC files with a scale band from 1:150,001 – 1:600,000. Approach scale band consists of ENC files with a scale band from 1:50,001 – 1:150,000. Harbour scale band consists of ENC files with a scale band from 1:5,000 – 1:50,000. Berthing scale band consists of ENC files with a scale band of larger than 1:5,000. The ENC filename is stored in the attribute named DSNM from the “coverage_area” feature layer. The third character within the filename is a numeric value referencing to the following scale band category. For example, a filename of US2EC02M.000 indicates that it is within the General scale band category.1 = Overview 2 = General 3 = Coastal 4 = Approach 5 = Harbour 6 = BerthingTo learn more about the object attributes for each S-57 object, see the S-57 Object Catalogue.

The NOAA ENC Viewer provides a continuous depiction of all NOAA ENC ® coverage over U.S. coastal waters and the Great Lakes as would be shown on Electronic Chart Display and Information Systems (ECDIS). U.S. Chart No. 1 provides information about the symbology used in ECDIS. The NOAA ENC Viewer provides features that can be leveraged in various GIS and OGC WMS compliant applications. ENC Viewer highlights many of the following features.Generic featuresDisplays the S-57 datasets using S-52 presentation library specification edition 3.4.Provides indexing for the S-57 attribute Object Name (OBJNAM)Provides access to S-57 attribute informationLinks external files to S-57 attributesAllows for the best scale data to be displayed similar to how an ECDIS displays best scale data based on the map scale as a user zooms in and out of the display.Web application featuresSearch entire service by object name (OBJNAM)Identify features and display their attributes in a pick listZoom to selected featuresChange basemapsMeasure area and distance, get coordinatesSet safety, shallow and deep depth contoursSwitch between simplified and traditional symbolsChange the background colors of the displayTurn off certain features or adjust transparencyUsers who want to display NOAA ENC® Viewer as a backdrop for GIS applications should use:Esri REST ServiceOGC WMS 1.3 CompatiblePlease note that certain functionality, such as identify and search, may not be supported by other GIS applications. For more information about Esri technology, email maritime@esri.com.

NOAA Electronic Navigational Charts (NOAA ENC®) are in International Hydrographic Organization (IHO) S-57 format, which is the standard used for the exchange of digital hydrographic data. NOAA ENC Online optimizes the viewing of the entire ENC suite, using the display rules defined by the IHO S-52 Specifications for Chart Content and Display Aspects of ECDIS.

This layer is sourced from maritimeboundaries.noaa.gov.

The ENC_General map service displays ENC data within the scale range of 1:600,001 and 1:1,500,000. The ENC data will be updated weekly. This map service is not intended for navigation purpose.

NOAA ENC® Online for U.S. WatersNOAA Electronic Navigational Charts (NOAA ENC®) are in International Hydrographic Organization (IHO) S-57 format, which is the standard used for the exchange of digital hydrographic data. NOAA ENC Online optimizes the viewing of the entire ENC suite, using the display rules defined by the IHO S-52 Specifications for Chart Content and Display Aspects of ECDIS.While features in a single NOAA ENC represent the geographic region that is depicted in that particular ENC cell, NOAA ENC Online provides a continuous depiction of the U.S. coastal waters as displayed on electronic chart systems. (See U.S. Chart No. 1for legend.)The NOAA ENC Online viewer provides features that can be leveraged in various GIS and OGC WMS compliant applications. ENC Online highlights many of the following features.NOAA ENC Online ViewerENCs are updated weekly and include all of the latest Notice to Mariners corrections.

NOAA, National Ocean Service, Office of Coast Survey, Marine Chart Division is responsible to build and maintain a suite of more than 1000 nautical charts that are used by commercial and recreational mariners to navigate the United States and U. S. territory waters safely.A Nautical Chart is a graphic portrayal of the marine environment. They are used to lay out courses and navigate ships by the shortest and most economically safe route. They can also serve as base maps for resource management and shoreline development planning by state and local government.Charts depict the location of the shoreline, minimum water depths, aids to navigation, hazards to navigation, the nature and form of the coast, water depths, the general character and configuration of the sea bottom, the rise and fall of the tides, protected areas, and the characteristics of the Earth's magnetism.The suite of charts is compiled and maintained with data provided by federal, state, and private partners such as the National Ocean Service elements, United States Coast Guard, United States Army Corps of Engineers, United States Power Squadron Auxiliary, Port Authorities.The charts are currently available as Lithographically printed paper charts, Electronic Raster Nautical Charts (RNCs), up-to-date paper charts (printed with print on demand technology), and are now offered as Digital Vector Electronic Nautical Charts (ENC).The NOAA RNCs are electronic images of the NOAA paper charts. The NOAA RNCs were productized with a successful Cooperative Research and Development Agreement (CRADA) with private sector partner BSB Electronic Charts, a subsidiary of Maptech, Inc. Andover, Massachusetts. As of November 1, 2005 the NOAA RNC's are available for free download via the NOAA website.

The NOAA ENC data are in International Hydrographic Organization (IHO) S-57 format, which is the data standard for the exchange of digital hydrographic data. Nautical chart features contained within a NOAA ENC provide a detailed representation of the U.S. coastal and marine environment. This data includes coastal topography, bathymetry, landmarks, geographic place names, and marine boundaries. Features in a NOAA ENC are limited in that they only represent the geographic region depicted in that particular ENC. Aggregating nautical features from all NOAA ENCs in the creation of GIS data results in a contiguous depiction of the U.S. coastal and marine environment.To learn more about S-57, visit the IHO website.For questions or comments, contact us.File naming conventions and scale bandsENC Direct to GIS data is organized by scale band, and there are six scale bands available: Overview, General, Coastal,Approach, Harbour, and Berthing.SCALE RATIOS:Overview scale band consists of ENC files with a scale band of smaller than 1:1,500,000. General scale band consists of ENC files with a scale band from 1:600,001 – 1:1,500,000. Coastal scale band consists of ENC files with a scale band from 1:150,001 – 1:600,000. Approach scale band consists of ENC files with a scale band from 1:50,001 – 1:150,000. Harbour scale band consists of ENC files with a scale band from 1:5,000 – 1:50,000. Berthing scale band consists of ENC files with a scale band of larger than 1:5,000. The ENC filename is stored in the attribute named DSNM from the “coverage_area” feature layer. The third character within the filename is a numeric value referencing to the following scale band category. For example, a filename of US2EC02M.000 indicates that it is within the General scale band category.1 = Overview 2 = General 3 = Coastal 4 = Approach 5 = Harbour 6 = BerthingTo learn more about the object attributes for each S-57 object, see the S-57 Object Catalogue.

This layer is sourced from maritimeboundaries.noaa.gov.

The ENC_General map service displays ENC data within the scale range of 1:600,001 and 1:1,500,000. The ENC data will be updated weekly. This map service is not intended for navigation purpose.

This layer is a component of Bands 4 and 5.

The ENC_Approach map service displays data compiled for ENC products with a scale range of 1:50,001 and 1:150,000. The ENC data used within this application will be updated weekly. This map service is not intended for navigation purpose.

This layer is a component of Bands 4 and 5.

The ENC_Approach map service displays data compiled for ENC products with a scale range of 1:50,001 and 1:150,000. The ENC data used within this application will be updated weekly. This map service is not intended for navigation purpose.

This layer is sourced from maritimeboundaries.noaa.gov.

The ENC_General map service displays ENC data within the scale range of 1:600,001 and 1:1,500,000. The ENC data will be updated weekly. This map service is not intended for navigation purpose.

Subscribers can find out export and import data of 23 countries by HS code or product’s name. This demo is helpful for market analysis.

Subscribers can find out export and import data of 23 countries by HS code or product’s name. This demo is helpful for market analysis.

Subscribers can find out export and import data of 23 countries by HS code or product’s name. This demo is helpful for market analysis.

This layer is a component of Bands 4 and 5.

The ENC_Approach map service displays data compiled for ENC products with a scale range of 1:50,001 and 1:150,000. The ENC data used within this application will be updated weekly. This map service is not intended for navigation purpose.

This layer is sourced from maritimeboundaries.noaa.gov.

The ENC_General map service displays ENC data within the scale range of 1:600,001 and 1:1,500,000. The ENC data will be updated weekly. This map service is not intended for navigation purpose.

Electronic Navigational Charts (ENC) are vector data sets that support all types of marine navigation. Originally designed for large commercial vessels using a sophisticated navigational computer called an Electronic Chart Display and Information System (ECDIS), ENCs are now also being used on simpler electronic chart systems and “chart plotters” on many types of ships and by recreational boaters. NOAA ENCs help provide real-time ship positioning, as well as collision and grounding avoidance.The ECDIS Display Service uses symbology developed by the International Hydrographic Organization (IHO) for the display of ENC data on Electronic Chart Display and Information Systems (ECDIS) that large ocean- going vessels and many smaller commercial ships use for navigation. This symbol set is commonly referred to by its IHO specification number, "S-52," or as "ECDIS symbology."NOAA ENCs comply with the International Hydrographic Organization ENC Product Specification. ENCs are produced around the world by many different countries’ national hydrographic or charting agencies. NOAA maintains more than 1,000 NOAA ENC® datasets over U.S. coastal waters and the Great Lakes.Free updates for NOAA ENCs are available weekly, which provide critical changes as well as the routine addition of newly compiled data, such as hydrographic or shoreline surveys. The NOAA Weekly Chart Updates page shows the areas that have changed on each ENC since its last new edition was published.ENCs also provide vector base maps for use in geographic information systems (GIS) that are used for coastal management and other purposes. The NOAA ENC Direct to GIS service supports extracting ENC data into GIS supported formats.Note: This layer is a feature service, which means it can be used for visualization and analysis throughout the ArcGIS Platform. This layer is not editable.

Subscribers can find out export and import data of 23 countries by HS code or product’s name. This demo is helpful for market analysis.

Subscribers can find out export and import data of 23 countries by HS code or product’s name. This demo is helpful for market analysis.