getAvailableGeographyLevels
import { getAvailableGeographyLevels } from '@esri/arcgis-rest-demographics';
//
getAvailableGeographyLevels()
  .then((response) => {
    response; // => { geographyLevels: [ ... ]  }
  });
Returns a list of available geography data layers, which can then be used in getGeography(). See the REST Documentation for more information.
Parameters
| Parameter | Type | Default | Notes | 
|---|---|---|---|
| requestOptions Optional | IEndpointOptions | Options to pass through to the geoenrichment service. | 
Available requestOptions
  
  | Property | Type | Notes | 
|---|---|---|
| Optional | string | Any ArcGIS Geoenrichment service (example: https://geoenrich.arcgis.com/arcgis/rest/services/World/geoenrichmentserver/Geoenrichment ) | 
| Optional Inherited | IAuthenticationManager | The instance of  | 
| Optional Inherited | RequestCredentials | A string indicating whether credentials (cookies) will be sent with the request. Used internally for authentication workflows. | 
| Optional Inherited | function(input: RequestInfo, init: RequestInit) : Promise<Response> | The implementation of  | 
| Optional Inherited | [key: string]: any | Additional Headers to pass into the request. | 
| Optional Inherited | boolean | Prevents the token from being passed in a URL Query param that is saved in browser history. Instead, the token will be passed in POST request body or through X-Esri-Authorization header. NOTE: This will force POST requests in browsers since auth header is not yet supported by preflight OPTIONS check with CORS. | 
| Optional Inherited | HTTPMethods | The HTTP method to send the request with. | 
| Optional Inherited | number | If the length of a GET request's URL exceeds  | 
| Optional Inherited | IParams | Additional parameters to pass in the request. | 
| Optional Inherited | string | Base url for the portal you want to make the request to. Defaults to authentication.portal if authentication exists, otherwise to 'https://www.arcgis.com/sharing/rest'. | 
| Optional Inherited | boolean | Return the raw response | 
Returns
A Promise that will resolve with available geography levels for the request.
| Property | Type | Notes | 
|---|---|---|
| Optional | any[] | any | null | |
| Optional | any[] | any | null | |
| Optional | any[] | any | null | |
| Optional | IGeographyLevel[] | IGeographyLevel | null | |
| Optional | string[] | string | null | 
Function defined in packages/arcgis-rest-demographics/src/getAvailableGeographyLevels.ts:64