A feature layer can contain a large number of features. To access a subset of these features, you can execute an SQL or spatial query, either together or individually. The results can contain the attributes, geometry, or both for each record. SQL and spatial queries are useful when a feature layer is very large and you want to access only a subset of its data.
In this tutorial, you access and query a hosted feature layer with a geometry and spatial operator to only return intersecting records.
Prerequisites
You need an ArcGIS Developer or ArcGIS Online account to access the developer dashboard and create an API key.
Steps
Create a new pen
- If you are using the CDN libraries, to get started.
Get an API Key
To access location services, you need an API key or OAuth 2.0 access token. To learn how to create and scope your key, visit the Create an API key tutorial.
- Go to your dashboard to get an API key. The API key must be scoped to access the services used in this tutorial.
- In CodePen, update
apito use your key.Key
Make the request
Copy and paste the code below, following the steps to make a request to the feature service.
-
Reference the ArcGIS REST JS libraries either through CDN, ES Modules, or Node JS.
-
Set the
apiwith the API key from your dashboard.Key -
Define the parameters needed for the request.
-
Call the feature service and handle the results.
<!-- require ArcGIS REST JS libraries from https://unpkg.com -->
<script src="https://unpkg.com/@esri/arcgis-rest-request@4.0.0/dist/bundled/request.umd.js"></script>
<script src="https://unpkg.com/@esri/arcgis-rest-feature-service@4.0.0/dist/bundled/feature-service.umd.js"></script>
<script>
/* when including ArcGIS REST JS all exports are available
from the same arcgisRest global */
const apiKey = "YOUR_API_KEY";
const authentication = arcgisRest.ApiKeyManager.fromKey(apiKey);
const queryGeometry = {
x: -118.807,
y: 34.002,
spatialReference: {
wkid: 4326
}
};
arcgisRest
.queryFeatures({
url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/LA_County_Parcels/FeatureServer/0",
geometry: queryGeometry,
geometryType: "esriGeometryPoint",
spatialRel: "esriSpatialRelIntersects",
authentication
})
.then((response) => {
console.log(response.features);
document.getElementById("result").textContent = JSON.stringify(response.features, null, 2);
});
</script>
Result
Below is the response from the service:
[
{
"attributes": {
"OBJECTID": 985600,
"AIN": "4468002902",
"APN": "4468-002-902",
"SitusHouseNo": "0",
"SitusFraction": " ",
"SitusDirection": " ",
"SitusUnit": " ",
"SitusStreet": " ",
"SitusAddress": "",
"SitusCity": " ",
"SitusZIP": " ",
"SitusFullAddress": "",
"TaxRateArea": "10860",
"TaxRateCity": "MALIBU",
"AgencyClassNo": 505000,
"AgencyName": "State of California",
"AgencyType": "Miscellaneous",
"UseCode": "880V",
"UseCode_2": "88",
"UseType": "Government",
"UseDescription": "Government Parcel",
"DesignType1": null,
"YearBuilt1": null,
"EffectiveYear1": null,
"Units1": null,
"Bedrooms1": null,
"Bathrooms1": null,
What's next?
Learn how to use additional ArcGIS location services in these tutorials:
Query a feature layer (SQL)
Access and query a hosted feature layer with a SQL where clause.
Get global data
Query demographic information for locations around the world with the GeoEnrichment service.
Find a route and directions
Find a route and directions for an origin and destination by accessing the route service.