Google Geolocation API - 使用经度和纬度在文本框中获取地址?
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了Google Geolocation API - 使用经度和纬度在文本框中获取地址?相关的知识,希望对你有一定的参考价值。
我已经注意到很多关于如何根据IP地址使用Google地理位置查找您的位置的信息。但我想知道是否以及如何使用此服务输入位置(经度和纬度)并返回当前地址,或至少是一个城市,州。
我想在C#中这样做,但我会使用任何语言。
有什么建议?
你所描述的被称为Reverse Geocoding。 Google提供了Geocoding Web Service API,您可以从服务器端应用程序(使用任何语言)调用to do reverse geocoding。
例如,以下请求:
http://maps.google.com/maps/api/geocode/xml?latlng=40.714224,-73.961452&sensor=false
...将返回如下所示的响应(截断):
<GeocodeResponse>
<status>OK</status>
<result>
<type>street_address</type>
<formatted_address>277 Bedford Ave, Brooklyn, NY 11211, USA</formatted_address>
<address_component>
<long_name>277</long_name>
<short_name>277</short_name>
<type>street_number</type>
</address_component>
<address_component>
<long_name>Bedford Ave</long_name>
<short_name>Bedford Ave</short_name>
<type>route</type>
</address_component>
<address_component>
<long_name>Brooklyn</long_name>
<short_name>Brooklyn</short_name>
<type>sublocality</type>
<type>political</type>
</address_component>
<address_component>
<long_name>New York</long_name>
<short_name>New York</short_name>
<type>locality</type>
<type>political</type>
</address_component>
<address_component>
<long_name>Kings</long_name>
<short_name>Kings</short_name>
<type>administrative_area_level_2</type>
<type>political</type>
</address_component>
<address_component>
<long_name>New York</long_name>
<short_name>NY</short_name>
<type>administrative_area_level_1</type>
<type>political</type>
</address_component>
<address_component>
<long_name>United States</long_name>
<short_name>US</short_name>
<type>country</type>
<type>political</type>
</address_component>
<address_component>
<long_name>11211</long_name>
<short_name>11211</short_name>
<type>postal_code</type>
</address_component>
<geometry>
<location>
<lat>40.7142330</lat>
<lng>-73.9612910</lng>
</location>
<location_type>ROOFTOP</location_type>
<viewport>
<southwest>
<lat>40.7110854</lat>
<lng>-73.9644386</lng>
</southwest>
<northeast>
<lat>40.7173806</lat>
<lng>-73.9581434</lng>
</northeast>
</viewport>
</geometry>
</result>
</GeocodeResponse>
但请注意,Google Maps API Terms of Use似乎是prohibit the storage of the results,除非商店充当Google地图中使用的数据的缓存。您可能希望与Google取得联系,并询问Google Maps API Premier,以便为您的地理编码要求提供更灵活的使用条款。
这是一个c#实现。请注意,我不是c#程序员 - 因此代码可能很难看。但它的确有效。它为您提供的不仅仅是地址。这是一个控制台应用程序,您应该能够轻松地将其用于webforms或winforms。
using System;
using System.Threading;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Xml;
using System.Xml.XPath;
namespace ReverseGeoLookup
{
// http://code.google.com/apis/maps/documentation/geocoding/#ReverseGeocoding
public static string ReverseGeoLoc(string longitude, string latitude,
out string Address_ShortName,
out string Address_country,
out string Address_administrative_area_level_1,
out string Address_administrative_area_level_2,
out string Address_administrative_area_level_3,
out string Address_colloquial_area,
out string Address_locality,
out string Address_sublocality,
out string Address_neighborhood)
{
Address_ShortName = "";
Address_country = "";
Address_administrative_area_level_1 = "";
Address_administrative_area_level_2 = "";
Address_administrative_area_level_3 = "";
Address_colloquial_area = "";
Address_locality = "";
Address_sublocality = "";
Address_neighborhood = "";
XmlDocument doc = new XmlDocument();
try
{
doc.Load("http://maps.googleapis.com/maps/api/geocode/xml?latlng=" + latitude + "," + longitude + "&sensor=false");
XmlNode element = doc.SelectSingleNode("//GeocodeResponse/status");
if (element.InnerText == "ZERO_RESULTS")
{
return ("No data available for the specified location");
}
else
{
element = doc.SelectSingleNode("//GeocodeResponse/result/formatted_address");
string longname="";
string shortname="";
string typename ="";
bool fHit=false;
XmlNodeList xnList = doc.SelectNodes("//GeocodeResponse/result/address_component");
foreach (XmlNode xn in xnList)
{
try
{
longname = xn["long_name"].InnerText;
shortname = xn["short_name"].InnerText;
typename = xn["type"].InnerText;
fHit = true;
switch (typename)
{
//Add whatever you are looking for below
case "country":
{
Address_country = longname;
Address_ShortName = shortname;
break;
}
case "locality":
{
Address_locality = longname;
//Address_locality = shortname; //Om Longname visar sig innehålla konstigheter kan man använda shortname istället
break;
}
case "sublocality":
{
Address_sublocality = longname;
break;
}
case "neighborhood":
{
Address_neighborhood = longname;
break;
}
case "colloquial_area":
{
Address_colloquial_area = longname;
break;
}
case "administrative_area_level_1":
{
Address_administrative_area_level_1 = longname;
break;
}
case "administrative_area_l以上是关于Google Geolocation API - 使用经度和纬度在文本框中获取地址?的主要内容,如果未能解决你的问题,请参考以下文章
Google Geolocation API 和 Google Maps Android SDK
Google Maps Geolocation API 的替代方案
Google Maps Geolocation API 准确性
用于 wifiAccessPoints 的 Google Maps Geolocation API 返回未找到的地理位置