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ENC layers

ENC layers are used to visualize and interact with electronic navigational charts (ENCs). ArcGIS Pro supports ENCs that conform to the International Hydrographic Organization (IHO) S-57 standard and S-101 standard including:

  • S-57 Electronic Navigational Chart (ENC) edition 3.1

  • S-101 Electronic Navigational Chart (ENC) edition 2.0.0

  • Inland ENC (IENC) edition 2.4

  • Additional Military Layers (AML) edition 3.0

  • Bathymetric Inland ENC (bIENC) editions 2.4, 2.5, 2.6

You can use ENC layers to do the following:

  • View ENC data in compliance with S-101 or S-57/S-52 standards and specifications for chart content display.

  • View ENC data in tabular form by object type so you can view object attributes.

  • Use ENC data as an additional data source for situational awareness and decision making.

  • Combine ENC datasets with other sources to inform geospatial analysis.

ENC layers are created from S-57 and S-101 cells (.000 files), which represent navigational chart data at a particular scale. The data in a single cell corresponds to a single navigational use, such as overview, general, or coastal (a navigational use corresponds to a scale range suitable for a particular use).

ENC layers for S-57 cells are symbolized with S-52 symbology. ENC layers for S-101 cells are symbolized with the S-101 Portrayal Catalogue version 2.0.0. Both are accessible from the Symbology pane. It's important to set all symbology options to the same settings when viewing a series of cells in a single map so that the chart view is consistent.

ENC layers support pop-ups that show attribute information for the identified objects. Attributes differ across object types in the ENC layer.

The Data Set Identification (DSID), Data Set Structure Information (DSSI), and Data Set Parameter (DSPM) attributes for each cell are viewable on the Source tab of the Properties dialog box for the layer.