Feature layer rendering mode (map)

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Sample viewer app

Render features statically or dynamically by setting the feature layer rendering mode.

Image of feature layer rendering mode map

Use case

In dynamic rendering mode, features and graphics are stored on the GPU. As a result, dynamic rendering mode is good for moving objects and for maintaining graphical fidelity during extent changes, since individual graphic changes can be efficiently applied directly to the GPU state. This gives the map or scene a seamless look and feel when interacting with it. The number of features and graphics has a direct impact on GPU resources, so large numbers of features or graphics can affect the responsiveness of maps or scenes to user interaction. Ultimately, the number and complexity of features and graphics that can be rendered in dynamic rendering mode is dependent on the power and memory of the device's GPU.

In static rendering mode, features and graphics are rendered only when needed (for example, after an extent change) and offloads a significant portion of the graphical processing onto the CPU. As a result, less work is required by the GPU to draw the graphics, and the GPU can spend its resources on keeping the UI interactive. Use this mode for stationary graphics, complex geometries, and very large numbers of features or graphics. The number of features and graphics has little impact on frame render time, meaning it scales well, and pushes a constant GPU payload. However, rendering updates is CPU and system memory intensive, which can have an impact on device battery life.

How to use the sample

When the sample is launched, it will trigger the same zoom animation on both the static and dynamic maps.

How it works

  1. Create an ArcGISMap
  2. Set the RenderingMode for a specific type of Graphic e.g. for a Point by calling arcGISMap.getLoadSettings().setPreferredPointFeatureRenderingMode(FeatureLayer.RenderingMode.DYNAMIC).

    • You can set the preferred rendering mode for Point, Polyline, or Polygon by using the appropriate method.
    • The rendering mode can be set to STATIC, DYNAMIC or AUTOMATIC
    • In Static rendering mode, the number of features and graphics has little impact on frame render time, meaning it scales well, however points don't stay screen-aligned and point/polyline/polygon objects are only redrawn once map view navigation is complete.
    • In Dynamic rendering mode, large numbers of features or graphics can affect the responsiveness of maps or scenes to user interaction, however points remain screen-aligned and point/polyline/polygon objects are continually redrawn while the map view is navigating.
    • When left to automatic rendering, points are drawn dynamically and polylines and polygons statically.

Relevant API

  • ArcGISMap
  • FeatureLayer
  • LoadSettings
  • MapView

Tags

dynamic, feature layer, features, rendering, static

Sample Code

FeatureLayerRenderingModeMapSample.java
                                                                                                                                                         
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/*
 * Copyright 2017 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
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 */

package com.esri.samples.feature_layer_rendering_mode_map;

import java.util.Arrays;

import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.geometry.Orientation;
import javafx.scene.Scene;
import javafx.scene.control.SplitPane;
import javafx.stage.Stage;
import javafx.util.Duration;

import com.esri.arcgisruntime.data.ServiceFeatureTable;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReferences;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.MapView;

public class FeatureLayerRenderingModeMapSample extends Application {

  private MapView mapViewTop;
  private MapView mapViewBottom;
  private Timeline timeline;

  @Override
  public void start(Stage stage) {

    try {

      // create splitPane pane and JavaFX app scene
      SplitPane splitPane = new SplitPane();
      splitPane.setOrientation(Orientation.VERTICAL);
      Scene fxScene = new Scene(splitPane);

      // set title, size, and add JavaFX scene to stage
      stage.setTitle("Feature Layer Rendering Mode Map Sample");
      stage.setWidth(800);
      stage.setHeight(700);
      stage.setScene(fxScene);
      stage.show();

      // create a map (top) and set it to render all features in static rendering mode
      ArcGISMap mapTop = new ArcGISMap();
      mapTop.getLoadSettings().setPreferredPointFeatureRenderingMode(FeatureLayer.RenderingMode.STATIC);
      mapTop.getLoadSettings().setPreferredPolylineFeatureRenderingMode(FeatureLayer.RenderingMode.STATIC);
      mapTop.getLoadSettings().setPreferredPolygonFeatureRenderingMode(FeatureLayer.RenderingMode.STATIC);

      // create a map (bottom) and set it to render all features in dynamic rendering mode
      ArcGISMap mapBottom = new ArcGISMap();
      mapBottom.getLoadSettings().setPreferredPointFeatureRenderingMode(FeatureLayer.RenderingMode.DYNAMIC);
      mapBottom.getLoadSettings().setPreferredPolylineFeatureRenderingMode(FeatureLayer.RenderingMode.DYNAMIC);
      mapBottom.getLoadSettings().setPreferredPolygonFeatureRenderingMode(FeatureLayer.RenderingMode.DYNAMIC);

      // creating top map view
      mapViewTop = new MapView();
      mapViewTop.setMap(mapTop);
      splitPane.getItems().add(mapViewTop);
      // creating bottom map view
      mapViewBottom = new MapView();
      mapViewBottom.setMap(mapBottom);
      splitPane.getItems().add(mapViewBottom);

      // create service feature table using a point, polyline, and polygon service
      ServiceFeatureTable pointServiceFeatureTable = new ServiceFeatureTable("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/0");
      ServiceFeatureTable polylineServiceFeatureTable = new ServiceFeatureTable("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/8");
      ServiceFeatureTable polygonServiceFeatureTable = new ServiceFeatureTable("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/9");

      // create feature layer from service feature tables
      FeatureLayer pointFeatureLayer = new FeatureLayer(pointServiceFeatureTable);
      FeatureLayer polylineFeatureLayer = new FeatureLayer(polylineServiceFeatureTable);
      FeatureLayer polygonFeatureLayer = new FeatureLayer(polygonServiceFeatureTable);

      // add each layer to top and bottom map
      mapTop.getOperationalLayers().addAll(Arrays.asList(pointFeatureLayer, polylineFeatureLayer, polygonFeatureLayer));
      mapBottom.getOperationalLayers().addAll(Arrays.asList(pointFeatureLayer.copy(), polylineFeatureLayer.copy(), polygonFeatureLayer.copy()));

      // viewpoint locations for map view to zoom in and out to
      Viewpoint zoomOutPoint = new Viewpoint(new Point(-118.37, 34.46, SpatialReferences.getWgs84()), 650000, 0);
      Viewpoint zoomInPoint = new Viewpoint(new Point(-118.45, 34.395, SpatialReferences.getWgs84()), 50000, 90);
      mapViewTop.setViewpoint(zoomOutPoint);
      mapViewBottom.setViewpoint(zoomOutPoint);

      //loop an animation into and out from the zoom in point (5 seconds each) with a 2 second gap between zooming
      timeline = new Timeline();
      timeline.setCycleCount(Animation.INDEFINITE);
      timeline.getKeyFrames().add(new KeyFrame(Duration.seconds(7), event -> zoomTo(zoomInPoint)));
      timeline.getKeyFrames().add(new KeyFrame(Duration.seconds(14), event -> zoomTo(zoomOutPoint)));
      timeline.play();

    } catch (Exception e) {
      // on any error, display the stack trace.
      e.printStackTrace();
    }
  }

  /**
   * Sets both MapViews to a Viewpoint over a number of seconds.
   *  @param viewpoint to which both MapViews should be set.
   *
   */
  private void zoomTo(Viewpoint viewpoint) {
    mapViewTop.setViewpointAsync(viewpoint, 5);
    mapViewBottom.setViewpointAsync(viewpoint, 5);
  }

  /**
   * Stops and releases all resources used in application.
   */
  @Override
  public void stop() {

    // stop the timer
    timeline.stop();

    if (mapViewTop != null) {
      mapViewTop.dispose();
    }
    if (mapViewBottom != null) {
      mapViewBottom.dispose();
    }
  }

  /**
   * Opens and runs application.
   *
   * @param args arguments passed to this application
   */
  public static void main(String[] args) {

    Application.launch(args);
  }

}

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