Choosing the correct spatial reference is important for ensuring accurate projection of data points to a map.
How to use the sample
Pan and zoom around the map. Observe how the map is displayed using the World Bonne spatial reference.
How it works
Instantiate an ArcGISMap object using a spatial reference e.g. ArcGISMap(SpatialReference.create(54024)).
Instantiate a Basemap object using an ArcGISMapImageLayer object.
Set the base map to the map.
Set the map to a MapView object.
The ArcGIS map image layer will now use the spatial reference set to the ArcGIS map (World Bonne (WKID: 54024)) and not its default spatial reference.
Relevant API
ArcGISMap
ArcGISMapImageLayer
Basemap
MapView
SpatialReference
Additional information
Operational layers will automatically project to this spatial reference when possible.
Tags
project, spatial reference, WKID
Sample Code
MapSpatialReferenceSample.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.map_spatial_reference;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import com.esri.arcgisruntime.geometry.SpatialReference;
import com.esri.arcgisruntime.layers.ArcGISMapImageLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.view.MapView;
publicclassMapSpatialReferenceSampleextendsApplication{
private MapView mapView;
privatestaticfinal String IMAGE_LAYER_URL =
"https://sampleserver6.arcgisonline.com/arcgis/rest/services/SampleWorldCities/MapServer";
@Overridepublicvoidstart(Stage stage){
try {
// create stack pane and application scene StackPane stackPane = new StackPane();
Scene scene = new Scene(stackPane);
// set title, size, and add scene to stage stage.setTitle("Map Spatial Reference Sample");
stage.setWidth(800);
stage.setHeight(700);
stage.setScene(scene);
stage.show();
// create a ArcGISMap with a spatial referencefinal ArcGISMap map = new ArcGISMap(SpatialReference.create(54024));
// create a ArcGISMap image layer from urlfinal ArcGISMapImageLayer mapImageLayer = new ArcGISMapImageLayer(IMAGE_LAYER_URL);
// create basemap from the ArcGISMap image layer Basemap basemap = new Basemap(mapImageLayer);
// add the basemap to the ArcGISMap map.setBasemap(basemap);
// create a view and set ArcGISMap to it mapView = new MapView();
mapView.setMap(map);
// add the map view to stack pane stackPane.getChildren().add(mapView);
} catch (Exception e) {
// on any error, display the stack trace. e.printStackTrace();
}
}
/**
* Stops and releases all resources used in application.
*/@Overridepublicvoidstop(){
if (mapView != null) {
mapView.dispose();
}
}
/**
* Opens and runs application.
*
* @param args arguments passed to this application
*/publicstaticvoidmain(String[] args){
Application.launch(args);
}
}