Learn how to search for businesses, POIs, and geographic locations with the geocoding service.
Place finding is the process of searching for a place name or POI to find its address and location. You can use the Geocoding service to find places such as coffee shops, gas stations, or restaurants for any geographic location around the world. You can search for places by name or by using categories. You can search near a location or you can search globally.
In this tutorial, you will use a locator to access the Geocoding service and find places by place category. Pop-ups are used to display the place name and address.
To learn more about geocoding and searching for places, visit Geocode and search in the Mapping and location services guide.
Prerequisites ArcGIS Accounts:You need an ArcGIS Location Platform or ArcGIS Online account.
Steps Create a new penYou need an access token with the correct privileges to access the location services used in this tutorial.
esriConfig.apiKey to your access token.
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var esriConfig = {
apiKey: "YOUR_ACCESS_TOKEN",
};
To learn about other ways to get an access token, go to Types of authentication.
Update the mapA streets basemap layer is typically used in geocoding applications. Update the basemap attribute to use the arcgis/navigation basemap layer and change the position of the map to center on Tromso.
Update the basemap attribute from arcgis/topographic to arcgis/navigation and the center to 18.9553,69.6492.
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<arcgis-map basemap="arcgis/navigation" center="18.9553,69.6492" zoom="13">
<arcgis-zoom slot="top-left"></arcgis-zoom>
</arcgis-map>
You filter place search results by providing a location and category. Places can be filtered by categories such as coffee shop, gas station, and hotels. Use a Calcite Select component to provide a list of several categories from which to choose.
NoteFor a full list of place categories you can use, visit the REST API documentation.
Inside a Calcite Block component, add a Calcite Select component with an id of places-select and a Label of Choose a place type.
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<arcgis-map basemap="arcgis/navigation" center="18.9553,69.6492" zoom="13">
<arcgis-zoom slot="top-left"></arcgis-zoom>
<calcite-block expanded slot="top-right">
<calcite-label id="places-select-label">
Choose a place type
<calcite-select id="places-select">
</calcite-select>
</calcite-label>
</calcite-block>
</arcgis-map>
Create an option component for each category and add it to the Select component.
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<arcgis-map basemap="arcgis/navigation" center="18.9553,69.6492" zoom="13">
<arcgis-zoom slot="top-left"></arcgis-zoom>
<calcite-block expanded slot="top-right">
<calcite-label id="places-select-label">
Choose a place type
<calcite-select id="places-select">
<calcite-option value="Parks and Outdoors">Parks and Outdoors</calcite-option>
<calcite-option value="Coffee shop">Coffee shop</calcite-option>
<calcite-option value="Gas station">Gas station</calcite-option>
<calcite-option value="Food">Food</calcite-option>
<calcite-option value="Hotel">Hotel</calcite-option>
</calcite-select>
</calcite-label>
</calcite-block>
</arcgis-map>
Add a script tag with the type attribute set to module, to the bottom of the body.
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<body>
<arcgis-map basemap="arcgis/navigation" center="18.9553,69.6492" zoom="13">
<arcgis-zoom slot="top-left"></arcgis-zoom>
<calcite-block expanded slot="top-right">
<calcite-label id="places-select-label">
Choose a place type
<calcite-select id="places-select">
<calcite-option value="Parks and Outdoors">Parks and Outdoors</calcite-option>
<calcite-option value="Coffee shop">Coffee shop</calcite-option>
<calcite-option value="Gas station">Gas station</calcite-option>
<calcite-option value="Food">Food</calcite-option>
<calcite-option value="Hotel">Hotel</calcite-option>
</calcite-select>
</calcite-label>
</calcite-block>
</arcgis-map>
<script type="module">
</script>
</body>
Using $arcgis.import, add the Graphic and locator modules.
The ArcGIS Maps SDK for JavaScript is available via CDN and npm, but this tutorial is based on CDN. The $arcgis.import global function accepts a module path or array of module paths, and returns a promise that resolves with the requested modules. This function can only be used when working with the CDN; otherwise, use the standard import syntax. To learn more about the SDK's different modules, visit the References page.
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<script type="module">
const [Graphic, locator] = await $arcgis.import([
"@arcgis/core/Graphic",
"@arcgis/core/rest/locator",
]);
</script>
Define variables for the components you will use in the app. You will use these variables to access the components and their properties.
Define variables for the map and placesSelect components.
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<script type="module">
const [Graphic, locator] = await $arcgis.import([
"@arcgis/core/Graphic",
"@arcgis/core/rest/locator",
]);
const placesSelectElement = document.querySelector("#places-select");
const viewElement = document.querySelector("arcgis-map");
</script>
You can use a locator to access the Geocoding service.
locatorUrl, to the URL for the Geocoding service.
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<script type="module">
const [Graphic, locator] = await $arcgis.import([
"@arcgis/core/Graphic",
"@arcgis/core/rest/locator",
]);
const placesSelectElement = document.querySelector("#places-select");
const viewElement = document.querySelector("arcgis-map");
const locatorUrl = "http://geocode-api.arcgis.com/arcgis/rest/services/World/GeocodeServer";
</script>
To find places, use the locator addressToLocations function. Performing a local search based on a category requires a location from which to search and a category name. The function sends a request to the Geocoding service and the service returns place candidates with a name, address and location information. Use the function to perform a search and add the results to the map as graphics.
Create a findPlaces function and call addressToLocations. Set the location, categories and outFields properties.
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<script type="module">
const [Graphic, locator] = await $arcgis.import([
"@arcgis/core/Graphic",
"@arcgis/core/rest/locator",
]);
const placesSelectElement = document.querySelector("#places-select");
const viewElement = document.querySelector("arcgis-map");
const locatorUrl = "http://geocode-api.arcgis.com/arcgis/rest/services/World/GeocodeServer";
async function findPlaces(category, point) {
const results = await locator.addressToLocations(locatorUrl, {
location: point,
categories: [category],
maxLocations: 25,
outFields: ["Place_addr", "PlaceName"],
});
}
</script>
Clear the view of existing pop-ups and graphics.
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async function findPlaces(category, point) {
const results = await locator.addressToLocations(locatorUrl, {
location: point,
categories: [category],
maxLocations: 25,
outFields: ["Place_addr", "PlaceName"],
});
viewElement.closePopup();
viewElement.graphics.removeAll();
}
Create a Graphic for each result returned. Set the attributes, geometry, symbol and popupTemplate properties for each. Add each graphic to the viewElement.
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async function findPlaces(category, point) {
const results = await locator.addressToLocations(locatorUrl, {
location: point,
categories: [category],
maxLocations: 25,
outFields: ["Place_addr", "PlaceName"],
});
viewElement.closePopup();
viewElement.graphics.removeAll();
results.forEach((result) => {
viewElement.graphics.add(
new Graphic({
attributes: result.attributes,
geometry: result.location,
symbol: {
type: "simple-marker",
color: "#000000",
size: "12px",
outline: {
color: "#ffffff",
width: "2px",
},
},
popupTemplate: {
title: "{PlaceName}",
content: "{Place_addr}",
},
}),
);
});
}
Call the findPlaces function when the Map loads and each time the Map changes and becomes stationary by listening to the arcgisViewChange event.
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viewElement.addEventListener("arcgisViewChange", () => {
if (viewElement.stationary) {
findPlaces(placesSelectElement.value, viewElement.center);
}
});
Places for parks should be displayed on the map. By dragging the map, you will see new places populate the view.
Use an event handler to call the findPlaces function when the category is changed.
calciteSelectChange event listener to listen for category changes.
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viewElement.addEventListener("arcgisViewChange", () => {
if (viewElement.stationary) {
findPlaces(placesSelectElement.value, viewElement.center);
}
});
placesSelectElement.addEventListener("calciteSelectChange", () => {
findPlaces(placesSelectElement.value, viewElement.center);
});
In CodePen, run your code to display the map.
When you select a category, you should see places displayed in the center of the map for the category you selected. The search occurs when the map loads and when the map view position changes by zooming or panning. You can also click on the graphics to display pop-ups with the name and address information for each place.
What's next?Learn how to use additional API features and ArcGIS services in these tutorials:
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