# reverseLookup(coordinate, callback, options) Converts a geographic coordinate to an address. ``` reverseLookup( coordinate: CoordinateData, callback: ( error: Error | null, result: GeocoderResponse | null, ) => void, options?: GeocoderReverseLookupOptions, ): Promise; ``` ## Parameters `coordinate` The coordinate to convert to a human-readable address. For example, `new` ``Coordinate```(37.779268, -122.419248)`, which represents San Francisco City Hall. `callback` MapKit JS invokes this callback function with two arguments, `error` on failure and `data` on success. If you cancel the request before you receive a response, the framework doesn’t call this function. - `error` (`Error`). Contains an error code and descriptive message. - `data` ([`GeocoderResponse`](/documentation/MapKitJS/GeocoderResponse)). An object that contains an array of places named [`results`](/documentation/MapKitJS/GeocoderResponse/results). `options` [`language`](/documentation/MapKitJS/GeocoderReverseLookupOptions/language) is the only option that you can set for the reverse geocoder. For example, `{ language: 'fr-CA' }` tells the server to send results localized to Canadian French. If you set it, this option overrides the language you provide in the [`Geocoder`](/documentation/MapKitJS/Geocoder) constructor. ## Return Value A promise that resolves with a [`GeocoderResponse`](/documentation/MapKitJS/GeocoderResponse) on success. ## Discussion Reverse geocoding converts geographic coordinates to the nearest human-readable address. ## Topics [`interface GeocoderReverseLookupOptions`](/documentation/MapKitJS/GeocoderReverseLookupOptions) An option that constrains reverse lookup results to a specific language. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)