地理编码响应中的 grounds 字段包含一个理由，该理由在填充后会提供有关地理编码所针对的直接管辖区域的背景信息。例如：
- 如果地理编码是位于公园内的博物馆，则场地可能是公园。
- 如果地理编码是商业街内的商店，则场地可能是商业街。
- 如果地理编码是体育中心内的餐厅，则场地可能是体育中心。
- 如果地理编码是大学内的一栋建筑，则场地可能是该大学。
- 如果地理编码是企业园区内的办公楼，则场地可能是企业园区。
原因包含以下值：
outline包含场地所覆盖的地球表面积的近似多边形的 GeoJSON 编码，使用 RFC 7946 格式name包含理由的名称，是一个具有子字段language_code和text的对象
对于一些（但并非所有）具有精确位置信息的地点（例如街道地址、建筑物和营业场所），系统会返回场地信息。代表较大区域（例如城市和地区）的地点不会随理由一起返回。
请求详情
您可以在以下类型的请求中获取导航点：
对于上述任何请求，您都必须提供以下参数：extra_computations=GROUNDS。
示例请求
以下查询使用地点地理编码来获取美国新泽西州哈肯萨克一家购物中心内餐厅的场地：
https://maps.googleapis.com/maps/api/geocode/json?place_id=ChIJ-Wdg_3b6wokRjB1ux1e68XM&extra_computations=GROUNDS&key=YOUR_API_KEY
示例响应
上述查询的响应会显示理由：
{
"grounds" : {
"display_name" : {
"language_code" : "en",
"text" : "The Shops at Riverside"
},
"outline" : {
"coordinates" : [
[
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[
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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,
40.9048524525955
],
[
-74.0318966384468,
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[
-74.03188946634801,
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[
-74.0318858802984,
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],
[
-74.03188605960089,
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[
-74.0317557066551,
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],
[
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[
-74.0315466397082,
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],
[
-74.03149625561549,
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[
-74.0314272240077,
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-74.0313515581648,
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-74.031280374868,
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-74.0312140327287,
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-74.0309237407716,
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-74.0309043760051,
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-74.0308932591939,
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[
-74.0308821423819,
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[
-74.0308654671629,
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-74.0285474182009,
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-74.0285409631984,
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-74.0284695995455,
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[
-74.0284391175751,
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-74.0284416278552,
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-74.0284448553581,
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[
-74.0284504138353,
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[
-74.0284848405289,
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],
[
-74.02849255067299,
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[
-74.0285024124847,
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],
[
-74.0285088674885,
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[
-74.0285178327711,
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[
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],
[
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],
[
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],
[
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],
[
-74.0285884791836,
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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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],
[
-74.03005788276261,
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],
[
-74.0300808336987,
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],
[
-74.03036987181341,
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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,
40.9079585672777
],
[
-74.03276087437951,
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]
]
],
"type" : "Polygon"
}
},
}
使用与构建轮廓和入口中的示例类似的 JavaScript 代码，我们能够在地图上渲染场地轮廓：
反馈
这是一项实验性功能。欢迎发送电子邮件至 geocoding-feedback-channel@google.com 提供反馈。