# Use GeoJSON data to set extrusion height

> **Note (legacy): A newer version of the Maps SDK is available**
> 
> This page uses v9.7.1 of the Mapbox Maps SDK. A newer version of the SDK is available. Learn about the latest version, v11.31.0, in the [Maps SDK documentation](https://docs.mapbox.com/android/maps/guides/).

Your browser doesn't support HTML5 video. Open [link to the video](https://docs.mapbox.com/android/android/assets/medias/maps-example-marathon-extrusion-activity-d1a11479cb249f0c385f6c8cab5a68a2.mp4).

> **Note**
> 
> This example is a part of the [Mapbox Android Demo app](https://github.com/mapbox/mapbox-android-demo). You can find the values for all referenced resources in the [`res`](https://github.com/mapbox/mapbox-android-demo/tree/master/MapboxAndroidDemo/src/main/res) directory. For example, see [`res/values/activity_strings.xml`](https://github.com/mapbox/mapbox-android-demo/tree/master/MapboxAndroidDemo/src/main/res/values/activity_strings.xml) for `R.string.*` references used in this example. The dependencies can be found [here.](https://github.com/mapbox/mapbox-navigation-android-examples/blob/main/app/build.gradle) The examples use View binding. [See setup documention if necessary.](https://developer.android.com/topic/libraries/view-binding)

Title: `activity_marathon_extrusion`

[View on GitHub](https://github.com/mapbox/mapbox-android-demo/tree/master/MapboxAndroidDemo/src/main/res/layout/activity_marathon_extrusion.xml)

```xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:mapbox="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.mapbox.mapboxandroiddemo.examples.extrusions.MarathonExtrusionActivity">

    <com.mapbox.mapboxsdk.maps.MapView
        android:id="@+id/mapView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="0dp"
        android:layout_marginLeft="0dp"
        android:layout_marginRight="0dp"
        android:layout_marginTop="0dp"
        mapbox:layout_constraintBottom_toBottomOf="parent"
        mapbox:layout_constraintHorizontal_bias="0.0"
        mapbox:layout_constraintLeft_toLeftOf="parent"
        mapbox:layout_constraintRight_toRightOf="parent"
        mapbox:layout_constraintTop_toTopOf="parent"
        mapbox:layout_constraintVertical_bias="1.0"
        mapbox:mapbox_cameraTargetLat="33.334915"
        mapbox:mapbox_cameraZoomMin="11"
        mapbox:mapbox_cameraTargetLng="-118.335074"
        mapbox:mapbox_cameraTilt="55.8873"
        mapbox:mapbox_cameraZoom="12.692151"
        />

</androidx.constraintlayout.widget.ConstraintLayout>
```

**Java**

Title: `MarathonExtrusionActivity.java`

[View on GitHub](https://github.com/mapbox/mapbox-android-demo/tree/master/MapboxAndroidDemo/src/main/java/com/mapbox/mapboxandroiddemo/examples/extrusions/MarathonExtrusionActivity.java)

```java
package com.mapbox.mapboxandroiddemo.examples.extrusions;

import android.graphics.Color;
import android.os.Bundle;

import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
import com.mapbox.mapboxsdk.style.layers.FillExtrusionLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;

import java.net.URI;
import java.net.URISyntaxException;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import timber.log.Timber;

import static com.mapbox.mapboxsdk.style.expressions.Expression.get;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionHeight;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillExtrusionOpacity;

/**
 * Use data-driven styling and GeoJSON data to set extrusions' heights
 */
public class MarathonExtrusionActivity extends AppCompatActivity implements OnMapReadyCallback {

  private MapView mapView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Mapbox access token is configured here. This needs to be called either in your application
    // object or in the same activity which contains the mapview.
    Mapbox.getInstance(this, getString(R.string.access_token));

    // This contains the MapView in XML and needs to be called after the access token is configured.
    setContentView(R.layout.activity_marathon_extrusion);

    mapView = findViewById(R.id.mapView);
    mapView.onCreate(savedInstanceState);
    mapView.getMapAsync(this);
  }

  @Override
  public void onMapReady(@NonNull final MapboxMap mapboxMap) {
    mapboxMap.setStyle(Style.SATELLITE, new Style.OnStyleLoaded() {
      @Override
      public void onStyleLoaded(@NonNull Style style) {
        try {
          // Add the marathon route source to the map
          // Create a GeoJsonSource and use the Mapbox Datasets API to retrieve the GeoJSON data
          // More info about the Datasets API at https://www.mapbox.com/api-documentation/#retrieve-a-dataset
          GeoJsonSource courseRouteGeoJson = new GeoJsonSource(
            "coursedata", new URI("asset://marathon_route.geojson"));
          style.addSource(courseRouteGeoJson);

          // Add FillExtrusion layer to map using GeoJSON data
          style.addLayer(new FillExtrusionLayer("course", "coursedata").withProperties(
            fillExtrusionColor(Color.YELLOW),
            fillExtrusionOpacity(0.7f),
            fillExtrusionHeight(get("e"))));

        } catch (URISyntaxException exception) {
          Timber.d(exception);
        }
      }
    });
  }

  @Override
  protected void onStart() {
    super.onStart();
    mapView.onStart();
  }

  @Override
  protected void onResume() {
    super.onResume();
    mapView.onResume();
  }

  @Override
  protected void onPause() {
    super.onPause();
    mapView.onPause();
  }

  @Override
  protected void onStop() {
    super.onStop();
    mapView.onStop();
  }

  @Override
  public void onLowMemory() {
    super.onLowMemory();
    mapView.onLowMemory();
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    mapView.onDestroy();
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    mapView.onSaveInstanceState(outState);
  }
}
```