Geocoding API は、住所、緯度と経度の座標、プレイス ID として場所を受け入れるサービスです。住所を緯度と経度の座標やプレイス ID に変換したり、緯度と経度の座標やプレイス ID を住所に変換したりできます。
Geocoding API を使用する理由
Google Maps Platform API のいずれかによって提供される地図内でジオコーディング データを使用する場合は、ウェブサイトまたはモバイル アプリケーションで Geocoding API を使用します。Geocoding API を使用すると、住所を使用して地図上にマーカーを配置したり、地図上のマーカーを住所に変換したりできます。このサービスは、地図上にアプリケーション コンテンツを配置するために、事前定義された静的住所をジオコーディングするように設計されています。
Geocoding API でできること
Geocoding API を使用すると、次のような 1 つ以上の住所または場所のジオコーディング データを取得できます。
住所の地理座標。
緯度と経度の座標のセットに対応する住所。
プレイス ID の住所。
検索結果の表示場所を制御し、特定の地域、都道府県、郵便番号に結果を制限できます。
Geocoding API の仕組み
Geocoding API は、ジオコーディングとリバース ジオコーディングの両方を実行します。
ジオコーディング: 「1600 Amphitheatre Parkway, Mountain View, CA」などの住所を緯度と経度の座標またはプレイス ID に変換します。これらの座標を使用して、地図上にマーカーを配置したり、ビューフレーム内で地図を中央に配置したり、位置を変更したりできます。
リバース ジオコーディング: 緯度と経度の座標またはプレイス ID を人が読める住所に変換します。住所は、配達や集荷など、さまざまなシナリオで使用できます。
次のデモでは、Maps JavaScript API を介してジオコーディング サービスを使用して、Geocoding API の仕組みを示します。地図を別のタブで開くと、その他のオプションと詳細が表示されます。
リソース
次の表に、Geocoding API で利用可能なリソースと、各エンドポイントが返すデータを示します。
[null,null,["最終更新日 2025-08-31 UTC。"],[[["\u003cp\u003eThe Geocoding API converts addresses into geographic coordinates (latitude and longitude) and vice versa.\u003c/p\u003e\n"],["\u003cp\u003eThis API is ideal for placing markers on maps based on addresses and retrieving addresses from map locations for static content, not dynamic user input.\u003c/p\u003e\n"],["\u003cp\u003eYou can use the Geocoding API to find geographic coordinates for addresses, addresses for coordinates, and addresses for Place IDs.\u003c/p\u003e\n"],["\u003cp\u003eThe API supports both geocoding (address to coordinates) and reverse geocoding (coordinates to address).\u003c/p\u003e\n"],["\u003cp\u003eClient libraries are available in Java, Python, Go, and Node.js for easy integration into your applications.\u003c/p\u003e\n"]]],[],null,["**European Economic Area (EEA) developers** If your billing address is in the European Economic Area, effective on 8 July 2025, the [Google Maps Platform EEA Terms of Service](https://cloud.google.com/terms/maps-platform/eea) will apply to your use of the Services. Functionality varies by region. [Learn more](/maps/comms/eea/faq). \n\nThe Geocoding API is a service that accepts a place as an\naddress, latitude and longitude coordinates, or Place ID. It converts the\naddress into latitude and longitude coordinates and a Place ID, or converts\nlatitude and longitude coordinates or a Place ID into an address.\n| **Note** : If you only want plus codes and don't want to use an API key, you can use the [Plus codes API](https://github.com/google/open-location-code/tree/main/Documentation).\n\nWhy use the Geocoding API\n\nUse the Geocoding API for website or mobile application when you want to use\ngeocoding data within maps provided by one of the Google Maps Platform APIs.\nWith the Geocoding API, you use addresses to place markers on a map, or\nconvert a marker on a map to an address. This service is designed for geocoding\n**predefined, static addresses** for placement of application\ncontent on a map.\n| This service is **not** designed to respond directly to user\n| input. To do dynamic geocoding, for example, in a user interface, see the\n| [Maps JavaScript API\n| client geocoder](/maps/documentation/javascript/geocoding) and/or the\n| [Google Play services Location APIs](https://developer.android.com/google/play-services/location.html).\n\nWhat you can do with the Geocoding API\n\nYou can use the Geocoding API to obtain geocoding data for one or more addresses or\nplaces, including the following:\n\n- Geographic coordinates for addresses.\n- Addresses for sets of latitude and longitude coordinates.\n- Addresses for place IDs.\n\nYou can control where the results appear and constrain the results to a particular region,\ncounty, or postal code.\n\nHow the Geocoding API works\n\nThe Geocoding API does both geocoding and reverse geocoding:\n\n- [**Geocoding**](/maps/documentation/geocoding/requests-geocoding): Converts addresses such as \"1600 Amphitheatre Parkway, Mountain View, CA\" into latitude and longitude coordinates or Place IDs. You can use these coordinates to place markers on a map, or to center or reposition the map within the view frame.\n- [**Reverse geocoding**](/maps/documentation/geocoding/requests-reverse-geocoding): Converts latitude/longitude coordinates or a Place ID into a human-readable address. You can use addresses for a variety of scenarios, including deliveries or pickups.\n\nThe following demo uses the Geocoding Service through the Maps JavaScript API\nto demonstrate how the Geocoding API works. Open the map in a separate tab\nto see more options and details.\n\nResources\n\nThe following table summarizes the resources available through the\nGeocoding API along with the data each endpoint returns.\n\n| Data resources | Data returned | Return format |\n|-------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|\n| [Geocoding](/maps/documentation/geocoding/requests-geocoding) | Returns address, address components, and address types. See [Results](/maps/documentation/geocoding/requests-geocoding#results) in the *Geocoding request and response* guide. | - JSON - XML |\n| [Reverse geocoding](/maps/documentation/geocoding/requests-reverse-geocoding) | Returns address, address components, and address types. See [Reverse geocoding responses](/maps/documentation/geocoding/requests-reverse-geocoding#reverse-response) in the Reverse geocoding request and response guide. | - JSON - XML |\n| [Place geocoding](/maps/documentation/geocoding/requests-places-geocoding) | Returns address, address components, and address types. See [Reverse geocoding responses](/maps/documentation/geocoding/requests-places-geocoding) in the Place geocoding request and response guide. | - JSON - XML |\n| - JSON - XML |\n\nHow to use the Geocoding API\n\n|---|---------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| 1 | **Get set up.** | Start with [Set up your Google Cloud project](/maps/documentation/geocoding/cloud-setup) and complete the setup instructions that follow. |\n| 2 | **Try a geocoding request** | Once you have an API key, you can start testing out the Geocoding API directly from curl or a browser. You'll need to supply the correct lookup parameters for address or component lookups. See [Geocoding parameters](/maps/documentation/geocoding/requests-geocoding#geocoding-lookup) for details. |\n| 3 | **Try a reverse geocoding request** | Supply latitude/longitude coordinates along with your API key to obtain address components for the closest human-readable address for that location. See [Reverse geocoding requests](/maps/documentation/geocoding/requests-reverse-geocoding#reverse-requests) for details. |\n| 4 | **Understand response basics** | All endpoints in the Geocoding API return the same data in either JSON or XML. See [Geocoding responses](/maps/documentation/geocoding/requests-geocoding#GeocodingResponses) for an explanation of the data, status codes, and error messages. |\n| 5 | **Incorporate geocoding data into your own app!** | You can use geocoding data to obtain addresses from map markers or to supply markers on a map based on a known address. |\n\nAvailable client libraries\n\nCall this API in the language of\nyour choice through one of the following client libraries:\n\n- [Java\n Client for Google Maps Services](https://github.com/googlemaps/google-maps-services-java)\n- [Python\n Client for Google Maps Services](https://github.com/googlemaps/google-maps-services-python)\n- [Go Client\n for Google Maps Services](https://github.com/googlemaps/google-maps-services-go)\n- [Node.js\n Client for Google Maps Services](https://github.com/googlemaps/google-maps-services-js)\n\nThe Java Client, Python Client, Go Client and Node.js Client for Google Maps\nServices are community-supported client libraries, open sourced under the\n[Apache 2.0 License](http://www.apache.org/licenses/LICENSE-2.0).\nDownload them from GitHub, where you can also find installation instructions and sample code.\n\nWhat's next\n\n- **Start using the Geocoding API** : Go to [Set up your\n Google Cloud project](/maps/documentation/geocoding/cloud-setup).\n- **Get started with sample requests and responses** : Go to [Geocoding requests and responses](/maps/documentation/geocoding/requests-geocoding)\n- **Follow best practices** : Go to [Geocoding Addresses Best\n Practices](/maps/documentation/geocoding/best-practices)."]]
