Introduction to visualization

There are different ways to style your data to create different types of visualizations. You can style basemap layers, which are composed of vector tile data, or feature layers, which are composed of features.

Basemap styles

You can use the default styles or you can create your own basemap styles that work with the basemap styles service. The following types are available:

• Default styles: Enumerations for existing styles such as arcgis/streets, arcgis/outdoor, and arcgis/nova.
• Custom styles: Styles you create and save as items using the ArcGIS Vector Tile Style Editor.

How to display a custom basemap style

1. Create a style with the ArcGIS Vector Tile Style Editor.
2. Go to the new basemap layer's item page and copy its item ID.
3. Reference the Esri Leaflet and vector plugins.
4. Instantiate the L.esri.Vector.vectorBasemapLayer class and set the item ID.

Example

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<script src="https://unpkg.com/esri-leaflet@3.0.12/dist/esri-leaflet.js"
    integrity="sha512-oUArlxr7VpoY7f/dd3ZdUL7FGOvS79nXVVQhxlg6ij4Fhdc4QID43LUFRs7abwHNJ0EYWijiN5LP2ZRR2PY4hQ=="
    crossorigin=""></script>

<script src="https://unpkg.com/esri-leaflet-vector@4.2.3/dist/esri-leaflet-vector.js"
    integrity="sha512-7rLAors9em7cR3/583gZSvu1mxwPBUjWjdFJ000pc4Wpu+fq84lXF1l4dbG4ShiPQ4pSBUTb4e9xaO6xtMZIlA=="
    crossorigin=""></script>

<script>
  L.esri.Vector.vectorBasemapLayer("6976148c11bd497d8624206f9ee03e30", {
    apiKey: apiKey
  }).addTo(map);
</script>

Feature styles

You can style and display points, lines, and polygons in a map by defining symbols for features. To style features in a feature layer, you define symbols and apply them with a renderer. For data-driven visualization, the symbol is always determined based on a data (attribute) value returned from a field in the data layer.

How to style a feature layer

1. Import your data from a CSV, XLS, GeoJSON, or Shapefile file to create a hosted feature layer.
2. Get the URL for the feature layer.
3. Reference the Esri Leaflet plugin.
4. Instantiate the L.esri.featureLayer class and set the URL.
5. Define the symbols for the features in the layer.

Example

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<script src="https://unpkg.com/esri-leaflet@3.0.12/dist/esri-leaflet.js"
    integrity="sha512-oUArlxr7VpoY7f/dd3ZdUL7FGOvS79nXVVQhxlg6ij4Fhdc4QID43LUFRs7abwHNJ0EYWijiN5LP2ZRR2PY4hQ=="
    crossorigin=""></script>

<script>
  L.esri
    .featureLayer({
      url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trails/FeatureServer/0",
      where: "USE_BIKE = 'YES'",
      pane: "bikeTrails",
      style: () => {
        return {
          color: "#FFFFFF",
          dashArray: "2, 3",
          dashOffset: "2",
          weight: "1.5"
        };
      }
    })
    .addTo(map);
</script>

Tutorials

Style a feature layer

Use data-driven styling to apply symbol colors and styles to feature layers.

Style vector tiles

Change the fill and outline of vector tiles based on their attributes.

Display a custom basemap style

Add a styled vector basemap layer to a map.