Style vector tiles

Learn how to customize based on their underlying feature data.

Style vector tiles using API key authentication

You can use Esri Leaflet to display data using custom styles. Esri Leaflet Vector supports the MapLibre style specification, which allows you to customize the fill, outline, opacity, and other properties of vector tiles to display data effectively. If your vector tiles are published from a , you can also perform data-driven visualizations based on of the original feature service.

In this tutorial, you style land parcels from a public according to their use type.

Prerequisites

Steps

Review the source data

This tutorial uses the Santa Monica Mountains Parcels . This vector tile service was created by publishing a as vector tiles using the . It contains the of the original feature service, which can be accessed to style layers in your application. Find the original feature service in your to view the names and values of different attributes.

  1. Go to the for the Santa Monica Mountains Parcels .

  2. Under Details, find the Created from property. Follow the link to view the item page for the original , Santa_Monica_Mountains_Parcels.

  3. Click the Data tab to view the layer's and . Each feature represents a land parcel and has attributes such as an address, use code, and number of square feet.

  4. Review the values of the UseType field. You will use this field to style vector tiles in your application.

Get the starter app

Select a type of authentication below and follow the steps to create a new application.

You can choose one of the following to create a new CodePen:

  • Option 1: Complete the Display a map tutorial; or,
  • Option 2: Start from the Display a map tutorial .

Set up authentication

Create in your for the type of authentication you selected.

Create a new with to access the resources used in this tutorial.

  1. Go to the Create an API key tutorial and create an with the following :
    • Privileges
      • Location services > Basemaps
    • Item access
      • Note: If you are using your own custom data layer for this tutorial, you need to grant the access to the layer item. Learn more in Item access privileges.
  2. When prompted, copy and paste the API key to a safe location. It will be used in the next step.

Set developer credentials

Use the API key or OAuth so your application can access .

  1. Update the accessToken variable to use your API key.

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      <script>
    
        /* Use for API key authentication */
        const accessToken = "YOUR_ACCESS_TOKEN";
    
        const map = L.map("map", {
          minZoom: 2
        })
    
        map.setView([34.02, -118.805], 13);
    
        const basemapEnum = "arcgis/streets";
    
        L.esri.Vector.vectorBasemapLayer(basemapEnum, {
          token: accessToken
        }).addTo(map);
    
      </script>
    

Add a vector tile layer

Use the VectorTileLayer class from Esri Leaflet Vector to add data from the Santa Monica Mountains Parcels to your application.

  1. Create a VectorTileLayer and set the url to the URL of the Santa Monica Mountains Parcels vector tile service. Add it to the map.

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        L.esri.Vector.vectorBasemapLayer(basemapEnum, {
          token: accessToken,
          pane: "tilePane"
        }).addTo(map);
    
        const parcelsUrl = "https://vectortileservices3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Santa_Monica_Mountains_Parcels_VTL/VectorTileServer";
    
        L.esri.Vector.vectorTileLayer(
          parcelsUrl,
    
        ).addTo(map);
    
      </script>
    
    Expand

Style parcels by use type

Use the MapLibre style specification to style land parcels according to their UseType category.

  1. Add a style function to the VectorTileLayer.

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        L.esri.Vector.vectorTileLayer(
          parcelsUrl,
    
          {
            style: function (style) {
    
              return style
            }
          }
    
        ).addTo(map);
    
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  2. Add a custom fill-color to the new style layer. Use get to retrieve UseType attribute values, viewed in the previous step. Use case to create a conditional expression that assigns a unique color to each use type.

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        L.esri.Vector.vectorTileLayer(
          parcelsUrl,
    
          {
            style: function (style) {
    
              style.layers[0].paint = {
                "fill-color": ['case',
                  ['==', ['get', 'UseType'], 'Residential'], '#E8E191', // Yellow
                  ['==', ['get', 'UseType'], 'Commercial'], '#E580A2', // Red
                  ['==', ['get', 'UseType'], 'Government'], '#79E284', // Green
                  ['==', ['get', 'UseType'], 'Industrial'], '#C080E5', // Purple
                  ['==', ['get', 'UseType'], 'Institutional'], '#80BBE5', // Blue
                  '#bfbfbf'
                ],
              }
    
              return style
            }
          }
    
        ).addTo(map);
    
    Expand
  3. Run the app. The vector tiles should appear with custom colors for residential, commercial, government, industrial, and institutional land parcels. All remaining parcels should be displayed in gray.

Add an outline layer

Add another style layer to the MapLibre style object to display parcel outlines.

  1. Add a line layer to the list of layers in the style object. Set the source to esri and the source-layer to Santa_Monica_Mountains_Parcels to reference the vector tile service.

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          {
            style: function (style) {
    
              style.layers[0].paint = {
                "fill-color": ['case',
                  ['==', ['get', 'UseType'], 'Residential'], '#E8E191', // Yellow
                  ['==', ['get', 'UseType'], 'Commercial'], '#E580A2', // Red
                  ['==', ['get', 'UseType'], 'Government'], '#79E284', // Green
                  ['==', ['get', 'UseType'], 'Industrial'], '#C080E5', // Purple
                  ['==', ['get', 'UseType'], 'Institutional'], '#80BBE5', // Blue
                  '#bfbfbf'
                ],
              }
    
              style.layers.push({
                id: "parcels-outline",
                source: "esri",
                "source-layer": "Santa_Monica_Mountains_Parcels",
                type: 'line',
    
              })
    
              return style
            }
          }
    
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  2. Style the color, width, and opacity of the parcel outlines.

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              style.layers.push({
                id: "parcels-outline",
                source: "esri",
                "source-layer": "Santa_Monica_Mountains_Parcels",
                type: 'line',
    
                paint: {
                  'line-color': '#000000',
                  'line-width': 0.25,
                  'line-opacity': 0.25
                }
    
              })
    
    Expand

Run the app

Run the app.

You should see the styled vector tile layer with parcels displayed on the basemap layer. Parcels should be styled in different colors based on their use type, and thin outlines should be present around each parcel.

What's next?

Learn how to use additional ArcGIS location services in these tutorials:

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Create, manage, and access API keys and OAuth 2.0 developer credentials, hosted layers, and data services.

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