Skip To Content ArcGIS for Developers Sign In Dashboard

ArcGIS Runtime SDK for .NET

Add ENC exchange set

This code sample is available for these platforms:
View Sample on GitHub

Display nautical charts per the ENC specification.

Image showing the add ENC exchange set app

Use case

The ENC specification describes how hydrographic data should be displayed digitally.

An ENC exchange set is a catalog of data files which can be loaded as cells. The cells contain information on how symbols should be displayed in relation to one another, so as to represent information such as depth and obstacles accurately.

How to use the sample

Run the sample and view the ENC data. Pan and zoom around the map. Take note of the high level of detail in the data and the smooth rendering of the layer.

How it works

  1. Specify the path to a local CATALOG.031 file to create an EncExchangeSet.
  2. After loading the exchange set, get the EncDataset objects in the exchange set.
  3. Create an EncCell for each dataset. Then create an EncLayer for each cell.
  4. Add the ENC layer to a map's operational layers collection to display it.

Relevant API

  • EncCell
  • EncDataset
  • EncExchangeSet
  • EncLayer

Offline data

This sample downloads the ENC Exchange Set without updates item from ArcGIS Online.


Data, ENC, maritime, nautical chart, layers, hydrographic

Sample Code

    d:DesignHeight="300" d:DesignWidth="300">
        <esriUI:MapView x:Name="MyMapView" />
// Copyright 2018 Esri.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
// language governing permissions and limitations under the License.

using System;
using ArcGISRuntime.Samples.Managers;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Hydrography;
using Esri.ArcGISRuntime.Mapping;
using System.Collections.Generic;
using Windows.UI.Popups;

namespace ArcGISRuntime.UWP.Samples.AddEncExchangeSet
        name: "Add ENC exchange set",
        category: "Hydrography",
        description: "Display nautical charts per the ENC specification.",
        instructions: "Run the sample and view the ENC data. Pan and zoom around the map. Take note of the high level of detail in the data and the smooth rendering of the layer.",
        tags: new[] { "Data", "ENC", "hydrographic", "layers", "maritime", "nautical chart" })]
    public partial class AddEncExchangeSet
        public AddEncExchangeSet()

            // Setup the control references and execute initialization

        private async void Initialize()
            // Initialize the map with an oceans basemap
            MyMapView.Map = new Map(Basemap.CreateOceans());

            // Get the path to the ENC Exchange Set
            string encPath = DataManager.GetDataFolder("9d2987a825c646468b3ce7512fb76e2d", "ExchangeSetwithoutUpdates", "ENC_ROOT", "CATALOG.031");

            // Create the Exchange Set
            // Note: this constructor takes an array of paths because so that update sets can be loaded alongside base data
            EncExchangeSet myEncExchangeSet = new EncExchangeSet(encPath);

                // Wait for the exchange set to load
                await myEncExchangeSet.LoadAsync();

                // Store a list of data set extent's - will be used to zoom the mapview to the full extent of the Exchange Set
                List<Envelope> dataSetExtents = new List<Envelope>();

                // Add each data set as a layer
                foreach (EncDataset myEncDataSet in myEncExchangeSet.Datasets)
                    // Create the cell and layer
                    EncLayer myEncLayer = new EncLayer(new EncCell(myEncDataSet));

                    // Add the layer to the map

                    // Wait for the layer to load
                    await myEncLayer.LoadAsync();

                    // Add the extent to the list of extents

                // Use the geometry engine to compute the full extent of the ENC Exchange Set
                Envelope fullExtent = GeometryEngine.CombineExtents(dataSetExtents);

                // Set the viewpoint
                await MyMapView.SetViewpointAsync(new Viewpoint(fullExtent));
            catch (Exception e)
                await new MessageDialog(e.ToString(), "Error").ShowAsync();