Overview Learn how to find and track your device location on a map.
Applications can find, track, and display the geolocation for a device with the LocateTrackHTML5 Geolocation API to find the device's location and provide updates. Once your geolocation is found, you can zoom to the location, display a graphic, and follow along as your location changes. The LocateTrackTrackFind a route and directions tutorial. If you want to find places such as restaurants and gas stations around your current location, try the Find places tutorial.
In this tutorial, you will build an app to find and track your location on a map.
Accessing the device location with the Geolocation API is not supported on insecure origins. Therefore, to use the Locate and Track widgets, the tutorial must run on HTTPS. In most cases you can also use localhost for testing in browsers that supports Window.isSecureContext (currently Chrome and Firefox). Learn more here .
Prerequisites You need a free ArcGIS developer account to access your dashboard and API keys . The API key must be scoped to access the services used in this tutorial.
Steps Create a new pen To get started, either complete the Display a map tutorial or use this pen . Set the API key To access ArcGIS services , you need an API key .
Go to your dashboard to get an API key .
In CodePen , set the apiKey to your key, so it can be used to access basemap layer and location services.
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esriConfig.apiKey = "YOUR_API_KEY" ;
const map = new Map ({
basemap : "arcgis-topographic" // Basemap layer service
});
Change the basemap and map position In the main function, update the existing code to use the arcgis-navigation basemap. This basemap is optimized for navigation. Set the map to be zoomed out to the world.
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< html >
< head >
< meta charset = "utf-8" />
< meta name = "viewport" content = "initial-scale=1, maximum-scale=1, user-scalable=no" />
< title > ArcGIS API for JavaScript Tutorials: Display your location </ title >
< style >
html ,
body ,
#viewDiv {
padding : 0 ;
margin : 0 ;
height : 100% ;
width : 100% ;
}
</ style >
< link rel = "stylesheet" href = "https://js.arcgis.com/4.23/esri/themes/light/main.css" >
< script src = "https://js.arcgis.com/4.23/" > </ script >
< script >
require ([
"esri/config" ,
"esri/Map" ,
"esri/views/MapView" ,
"esri/widgets/Locate" ,
"esri/widgets/Track" ,
"esri/Graphic"
], function (
esriConfig,
Map ,
MapView,
Locate,
Track,
Graphic
) {
esriConfig.apiKey = "YOUR_API_KEY" ;
const map = new Map ({
basemap : "arcgis-navigation"
});
const view = new MapView({
container : "viewDiv" ,
map : map,
center : [- 40 , 28 ],
zoom : 2
});
const locate = new Locate({
view : view,
useHeadingEnabled : false ,
goToOverride : function ( view, options ) {
options.target.scale = 1500 ;
return view.goTo(options.target);
}
});
view.ui.add(locate, "top-left" );
const track = new Track({
view : view,
graphic : new Graphic({
symbol : {
type : "simple-marker" ,
size : "12px" ,
color : "green" ,
outline : {
color : "#efefef" ,
width : "1.5px"
}
}
}),
useHeadingEnabled : false
});
view.ui.add(track, "top-left" );
});
</ script >
</ head >
< body >
< div id = "viewDiv" > </ div >
</ body >
</ html >
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Find your geolocation The Locate
In the require statement, add the Locate
More info The ArcGIS API for JavaScript uses AMD modules . The require function is used to load modules so they can be used in the main function. It's important to keep the module references and function parameters in the same order.
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< html >
< head >
< meta charset = "utf-8" />
< meta name = "viewport" content = "initial-scale=1, maximum-scale=1, user-scalable=no" />
< title > ArcGIS API for JavaScript Tutorials: Display your location </ title >
< style >
html ,
body ,
#viewDiv {
padding : 0 ;
margin : 0 ;
height : 100% ;
width : 100% ;
}
</ style >
< link rel = "stylesheet" href = "https://js.arcgis.com/4.23/esri/themes/light/main.css" >
< script src = "https://js.arcgis.com/4.23/" > </ script >
< script >
require ([
"esri/config" ,
"esri/Map" ,
"esri/views/MapView" ,
"esri/widgets/Locate" ,
"esri/widgets/Track" ,
"esri/Graphic"
], function (
esriConfig,
Map ,
MapView,
Locate,
Track,
Graphic
) {
esriConfig.apiKey = "YOUR_API_KEY" ;
const map = new Map ({
basemap : "arcgis-navigation"
});
const view = new MapView({
container : "viewDiv" ,
map : map,
center : [- 40 , 28 ],
zoom : 2
});
const locate = new Locate({
view : view,
useHeadingEnabled : false ,
goToOverride : function ( view, options ) {
options.target.scale = 1500 ;
return view.goTo(options.target);
}
});
view.ui.add(locate, "top-left" );
const track = new Track({
view : view,
graphic : new Graphic({
symbol : {
type : "simple-marker" ,
size : "12px" ,
color : "green" ,
outline : {
color : "#efefef" ,
width : "1.5px"
}
}
}),
useHeadingEnabled : false
});
view.ui.add(track, "top-left" );
});
</ script >
</ head >
< body >
< div id = "viewDiv" > </ div >
</ body >
</ html >
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At the end of the code in the main function, create the LocateuseHeadingEnabled to false so it does not change the rotation of the map. Use the goToOverride to provide your own custom zoom functionality for the widget. In this case, it will zoom the map to a scale of 1500. Add the widget to the top left of the view.
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< html >
< head >
< meta charset = "utf-8" />
< meta name = "viewport" content = "initial-scale=1, maximum-scale=1, user-scalable=no" />
< title > ArcGIS API for JavaScript Tutorials: Display your location </ title >
< style >
html ,
body ,
#viewDiv {
padding : 0 ;
margin : 0 ;
height : 100% ;
width : 100% ;
}
</ style >
< link rel = "stylesheet" href = "https://js.arcgis.com/4.23/esri/themes/light/main.css" >
< script src = "https://js.arcgis.com/4.23/" > </ script >
< script >
require ([
"esri/config" ,
"esri/Map" ,
"esri/views/MapView" ,
"esri/widgets/Locate" ,
"esri/widgets/Track" ,
"esri/Graphic"
], function (
esriConfig,
Map ,
MapView,
Locate,
Track,
Graphic
) {
esriConfig.apiKey = "YOUR_API_KEY" ;
const map = new Map ({
basemap : "arcgis-navigation"
});
const view = new MapView({
container : "viewDiv" ,
map : map,
center : [- 40 , 28 ],
zoom : 2
});
const locate = new Locate({
view : view,
useHeadingEnabled : false ,
goToOverride : function ( view, options ) {
options.target.scale = 1500 ;
return view.goTo(options.target);
}
});
view.ui.add(locate, "top-left" );
const track = new Track({
view : view,
graphic : new Graphic({
symbol : {
type : "simple-marker" ,
size : "12px" ,
color : "green" ,
outline : {
color : "#efefef" ,
width : "1.5px"
}
}
}),
useHeadingEnabled : false
});
view.ui.add(track, "top-left" );
});
</ script >
</ head >
< body >
< div id = "viewDiv" > </ div >
</ body >
</ html >
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Run the application and click on the locate button to find your location. The map should zoom to a scale of 1500. The blue symbol represents your geolocation. You can remove the graphic by clicking on it and clicking the ... on the pop-up to remove the graphic.
If you have not previously allowed your browser to use your location, the browser will ask for permission before accessing the device location. You must approve this request in order for the Track widget to work.If you are using CodePen, the widget may not work in Editor view. If this happens, change to Debug view and run the app again.
Track your location The Track
In the require statement, add the TrackGraphic
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< html >
< head >
< meta charset = "utf-8" />
< meta name = "viewport" content = "initial-scale=1, maximum-scale=1, user-scalable=no" />
< title > ArcGIS API for JavaScript Tutorials: Display your location </ title >
< style >
html ,
body ,
#viewDiv {
padding : 0 ;
margin : 0 ;
height : 100% ;
width : 100% ;
}
</ style >
< link rel = "stylesheet" href = "https://js.arcgis.com/4.23/esri/themes/light/main.css" >
< script src = "https://js.arcgis.com/4.23/" > </ script >
< script >
require ([
"esri/config" ,
"esri/Map" ,
"esri/views/MapView" ,
"esri/widgets/Locate" ,
"esri/widgets/Track" ,
"esri/Graphic"
], function (
esriConfig,
Map ,
MapView,
Locate,
Track,
Graphic
) {
esriConfig.apiKey = "YOUR_API_KEY" ;
const map = new Map ({
basemap : "arcgis-navigation"
});
const view = new MapView({
container : "viewDiv" ,
map : map,
center : [- 40 , 28 ],
zoom : 2
});
const locate = new Locate({
view : view,
useHeadingEnabled : false ,
goToOverride : function ( view, options ) {
options.target.scale = 1500 ;
return view.goTo(options.target);
}
});
view.ui.add(locate, "top-left" );
const track = new Track({
view : view,
graphic : new Graphic({
symbol : {
type : "simple-marker" ,
size : "12px" ,
color : "green" ,
outline : {
color : "#efefef" ,
width : "1.5px"
}
}
}),
useHeadingEnabled : false
});
view.ui.add(track, "top-left" );
});
</ script >
</ head >
< body >
< div id = "viewDiv" > </ div >
</ body >
</ html >
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In the main function, replace the LocateTrackgraphic with a simple green symbol, and set the useHeadingEnabled to false so the map view doesn't rotate. Add the widget to the top left of the view.
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< html >
< head >
< meta charset = "utf-8" />
< meta name = "viewport" content = "initial-scale=1, maximum-scale=1, user-scalable=no" />
< title > ArcGIS API for JavaScript Tutorials: Display your location </ title >
< style >
html ,
body ,
#viewDiv {
padding : 0 ;
margin : 0 ;
height : 100% ;
width : 100% ;
}
</ style >
< link rel = "stylesheet" href = "https://js.arcgis.com/4.23/esri/themes/light/main.css" >
< script src = "https://js.arcgis.com/4.23/" > </ script >
< script >
require ([
"esri/config" ,
"esri/Map" ,
"esri/views/MapView" ,
"esri/widgets/Locate" ,
"esri/widgets/Track" ,
"esri/Graphic"
], function (
esriConfig,
Map ,
MapView,
Locate,
Track,
Graphic
) {
esriConfig.apiKey = "YOUR_API_KEY" ;
const map = new Map ({
basemap : "arcgis-navigation"
});
const view = new MapView({
container : "viewDiv" ,
map : map,
center : [- 40 , 28 ],
zoom : 2
});
const locate = new Locate({
view : view,
useHeadingEnabled : false ,
goToOverride : function ( view, options ) {
options.target.scale = 1500 ;
return view.goTo(options.target);
}
});
view.ui.add(locate, "top-left" );
const track = new Track({
view : view,
graphic : new Graphic({
symbol : {
type : "simple-marker" ,
size : "12px" ,
color : "green" ,
outline : {
color : "#efefef" ,
width : "1.5px"
}
}
}),
useHeadingEnabled : false
});
view.ui.add(track, "top-left" );
});
</ script >
</ head >
< body >
< div id = "viewDiv" > </ div >
</ body >
</ html >
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Run the App In CodePen , run your code to display the map.
Click the Track button in the top-left. The green symbol represents your location. Experiment with tracking your current location by moving to different locations. Visit the documentation to learn more about the geolocation tracking interval and timeout settings.
What's next? Learn how to use additional API features and
ArcGIS services in these tutorials: