Set initial map location

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Sample viewer app

Display a basemap centered at an initial location and scale.

Image of set initial map location

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

  1. Create an AGSMap, specifying a basemap style, latitude and longitude in WGS84, and a level of detail.
  2. Display the map in a map view.

Relevant API

  • AGSBasemapStyle
  • AGSMap
  • AGSMapView

About the data

The map opens with satellite imagery of a guitar-shaped field in the Pampas region of north central Argentina.

Tags

basemap style, center, envelope, extent, initial, lat, latitude, level of detail, location, LOD, long, longitude, scale, zoom level

Sample Code

SetInitialMapLocationViewController.swift
                                  
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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.

import UIKit
import ArcGIS

class SetInitialMapLocationViewController: UIViewController {
    @IBOutlet weak var mapView: AGSMapView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Add the source code button item to the right of navigation bar.
        (self.navigationItem.rightBarButtonItem as! SourceCodeBarButtonItem).filenames = ["SetInitialMapLocationViewController"]

        // Initialize map with imagery basemap.
        let map = AGSMap(basemapStyle: .arcGISImagery)

        // Assign the map to the map view.
        mapView.map = map
        mapView.setViewpoint(AGSViewpoint(latitude: -33.867886, longitude: -63.985, scale: 9027.977411))
    }
}

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