Display a basemap centered at an initial location and scale.
Use case
You can set a map's initial location when you want to highlight a particular feature or area to establish the context.
How to use the sample
When the map loads, note the specific location and scale of the initial map view.
How it works
Create a Map, specifying a basemap type, latitude and longitude in WGS84, and a level of detail.
Display the map in a map view.
Relevant API
BasemapType
Map
MapView
About the data
The map opens with satellite imagery of a guitar-shaped field in the Pampas region of north central Argentina.
Tags
basemap, center, envelope, extent, initial, lat, latitude, level of detail, location, LOD, long, longitude, scale, zoom level
Sample Code
SetInitialMapLocation.cs
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// Copyright 2016 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.using Android.App;
using Android.OS;
using Android.Widget;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
namespaceArcGISRuntime.Samples.SetInitialMapLocation{
[Activity (ConfigurationChanges=Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
[ArcGISRuntime.Samples.Shared.Attributes.Sample(
name: "Set initial map location",
category: "Map",
description: "Display a basemap centered at an initial location and scale.",
instructions: "When the map loads, note the specific location and scale of the initial map view.",
tags: new[] { "LOD", "basemap", "center", "envelope", "extent", "initial", "lat", "latitude", "level of detail", "location", "long", "longitude", "scale", "zoom level" })]
publicclassSetInitialMapLocation : Activity {
// Hold a reference to the map viewprivate MapView _myMapView;
protectedoverridevoidOnCreate(Bundle bundle) {
base.OnCreate(bundle);
Title = "Set initial map location";
// Create the UI, setup the control references and execute initialization CreateLayout();
Initialize();
}
privatevoidInitialize() {
// Create a map with 'Imagery with Labels' basemap and an initial location Map myMap = new Map(BasemapType.ImageryWithLabels, -33.867886, -63.985, 16);
// Provide used Map to the MapView _myMapView.Map = myMap;
}
privatevoidCreateLayout() {
// Create a new vertical layout for the app LinearLayout layout = new LinearLayout(this) { Orientation = Orientation.Vertical };
// Add the map view to the layout _myMapView = new MapView(this);
layout.AddView(_myMapView);
// Show the layout in the app SetContentView(layout);
}
}
}