地理編碼回應中的 grounds 欄位包含單一依據，填入後，即可提供地理編碼所在的直接區域的背景資訊。例如：
- 如果地理編碼是位於公園內的博物館，地面可能就是公園。
- 如果地理編碼是小型商場內的商店，地點可能就是小型商場。
- 如果地理編碼是位於體育中心內的餐廳，地點可能就是體育中心。
- 如果地理編碼是大學內的建築物，地點可能就是該大學。
- 如果地理編碼是企業園區內的辦公大樓，地點可能就是企業園區。
理由包含下列值：
outline包含多邊形的 GeoJSON 編碼，該編碼會使用 RFC 7946 格式，近似地表示地面覆蓋範圍name包含地點名稱，且為包含子欄位language_code和text的物件
系統會針對部分精確位置 (例如街道地址、建築物和機構) 傳回地點依據，但並非所有精確位置都會傳回。代表大範圍區域的地點 (例如城市和區域) 不會連同地面傳回。
要求詳細資料
您可以在下列類型的要求中取得導覽點：
針對任何這類要求，您都必須提供以下參數：extra_computations=GROUNDS。
要求範例
以下查詢使用地點地理編碼功能，取得位於美國新澤西州哈肯薩克 (Hackensack) 購物中心內的餐廳地點：
https://maps.googleapis.com/maps/api/geocode/json?place_id=ChIJ-Wdg_3b6wokRjB1ux1e68XM&extra_computations=GROUNDS&key=YOUR_API_KEY
回應範例
上述查詢的回應會顯示理由：
{
"grounds" : {
"display_name" : {
"language_code" : "en",
"text" : "The Shops at Riverside"
},
"outline" : {
"coordinates" : [
[
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[
-74.0328096444231,
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],
[
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],
[
-74.0329374864265,
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],
[
-74.0329543407656,
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],
[
-74.0329762155439,
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],
[
-74.03299916612821,
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],
[
-74.0330511635356,
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],
[
-74.0331433244228,
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],
[
-74.03309025123249,
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],
[
-74.0330778794394,
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],
[
-74.03304363287749,
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],
[
-74.03298374620459,
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],
[
-74.03284191870981,
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],
[
-74.0327045736519,
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],
[
-74.0324668194403,
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],
[
-74.03218782543171,
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],
[
-74.03202878431971,
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],
[
-74.031980910588,
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],
[
-74.0318966384468,
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],
[
-74.03188946634801,
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],
[
-74.0318858802984,
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],
[
-74.03188605960089,
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],
[
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],
[
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],
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],
[
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],
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],
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-74.031280374868,
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[
-74.02962647637111,
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[
-74.029634186469,
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[
-74.0296395656068,
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[
-74.0296417172619,
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[
-74.02964422752621,
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],
[
-74.02964691709499,
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[
-74.02964763431331,
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],
[
-74.02964727570421,
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[
-74.02964619987669,
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[
-74.02999046437181,
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[
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[
-74.0300808336987,
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[
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[
-74.03096784939891,
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[
-74.03120058499491,
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[
-74.0314021215987,
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[
-74.03163754620471,
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[
-74.03186472260489,
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[
-74.0319188719515,
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],
[
-74.0320239431563,
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],
[
-74.0324187665168,
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],
[
-74.0325363885767,
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],
[
-74.0326864641787,
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],
[
-74.03276087437951,
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]
]
],
"type" : "Polygon"
}
},
}
使用類似「建築物輪廓和入口」一節中範例的 JavaScript 程式碼，我們就能在地圖上算繪場地輪廓：
意見回饋
這項功能仍在實驗階段，歡迎透過 geocoding-feedback-channel@google.com 與我們聯絡，提供寶貴意見。