我有一个地址字符串。"12 Swiss Ave, Gonville, Wanganui, New Zealand"
有了这个地址，我需要弄清楚这个地址是在新西兰的北岛还是南岛。
如果我把地址传递给谷歌地图api，我得到的数据在下面，不幸的是，虽然它没有告诉我它在哪个岛。那么，我怎么检查这个呢?
{
"results": [
{
"address_components": [
{
"long_name": "12",
"short_name": "12",
"types": [
"street_number"
]
},
{
"long_name": "Swiss Avenue",
"short_name": "Swiss Ave",
"types": [
"route"
]
},
{
"long_name": "Gonville",
"short_name": "Gonville",
"types": [
"sublocality",
"political"
]
},
{
"long_name": "Wanganui",
"short_name": "Wanganui",
"types": [
"locality",
"political"
]
},
{
"long_name": "Manawatu-Wanganui",
"short_name": "Manawatu-Wanganui",
"types": [
"administrative_area_level_1",
"political"
]
},
{
"long_name": "New Zealand",
"short_name": "NZ",
"types": [
"country",
"political"
]
},
{
"long_name": "4501",
"short_name": "4501",
"types": [
"postal_code"
]
}
],
"formatted_address": "12 Swiss Avenue, Gonville, Wanganui 4501, New Zealand",
"geometry": {
"location": {
"lat": -39.9444245,
"lng": 175.0239575
},
"location_type": "ROOFTOP",
"viewport": {
"northeast": {
"lat": -39.9430755197085,
"lng": 175.0253064802915
},
"southwest": {
"lat": -39.9457734802915,
"lng": 175.0226085197085
}
}
},
"types": [
"street_address"
]
}
],
"status": "OK"
}
一种选择是获取两个岛屿的多边形，并对地理位置进行点多边形分析。
使用KML和geoxml3定义的多边形的例子
概念证明(使用geoxml3和来自gadm.org的修改KML)
============ 年长的选项使用融合表,不再有效 =============
使用FusionTables的示例(注意:不再工作，Fusion Layers被拒绝2019年12月)
概念证明(使用融合表中的自然地球数据集和"状态到岛屿"地图)(注:也不再起作用)
使用Google Map的API..
您可以从say Places Autocomplete中获得新西兰北岛的placeId，即ChIJhXgO3F4Uam0RdyMcnMutKMo
然后使用geocode库来获取边界，并使用contains函数来测试是否有另一个lat/lng在这些边界内。
const geocode = async placeId => {
const geocoder = new window.google.maps.Geocoder();
return new Promise((resolve, reject) => {
geocoder.geocode(
{
placeId
},
(results, status) => {
resolve(results[0]);
}
);
});
};
const placeDetails = await geocode('ChIJhXgO3F4Uam0RdyMcnMutKMo');
const somePlace = getPlaceDetails(someOtherPlaceId);
const isInNorthIsland = placeDetails.geometry.bounds.contains(somePlace.geometry.location);