從地址 C# 獲取緯度經度

Question

我正在使用地理編碼器的網絡服務來獲取地址、城市和州的經緯度。 當我使用下面的示例時，我沒有得到經緯度。 我在這里做錯了什么。

請求地址：1125 E. 102nd Street, Los Angeles, CA

這是我的代碼：

private void GetLatLongFromAddress(string street, string city, string state)
{
    string geocoderUri = string.Format(@"http://rpc.geocoder.us/service/rest?address={0},{1},{2}", street, city, state);
    XmlDocument geocoderXmlDoc = new XmlDocument();
    geocoderXmlDoc.Load(geocoderUri);
    XmlNamespaceManager nsMgr = new XmlNamespaceManager(geocoderXmlDoc.NameTable);
    nsMgr.AddNamespace("geo", @"http://www.w3.org/2003/01/geo/wgs84_pos#");
    string sLong = geocoderXmlDoc.DocumentElement.SelectSingleNode(@"//geo:long", nsMgr).InnerText;
    string sLat = geocoderXmlDoc.DocumentElement.SelectSingleNode(@"//geo:lat", nsMgr).InnerText;

    Latitude = Double.Parse(sLat);
    Longitude = Double.Parse(sLong);
}

lat 和 long 返回 0。我也嘗試添加郵政編碼，但這沒有用。 有沒有更好的網絡服務可以給我最新的結果。

提前致謝。

Answer 1

我經常使用Bing Maps Rest API 。 您可以使用如下請求進行地理編碼：

http://dev.virtualearth.net/REST/v1/Locations/CA/adminDistrict/postalCode/locality/addressLine?includeNeighborhood=includeNeighborhood&key=BingMapsKey

您可以在我寫的關於反應式擴展的codeproject 文章中看到它正在使用中。

例如，您的地址：

http://dev.virtualearth.net/REST/v1/Locations/US/1125%20E.%20102nd%20Street,%20Los%20Angeles,%20CA?key=Ai9-KNy6Al-r_ueyLuLXFYB_GlPl-c-_iYtu16byW86qBx9uGbsdJpwvrP4ZUdgD

給出以下響應：

{
   "authenticationResultCode":"ValidCredentials",
   "brandLogoUri":"http:\/\/dev.virtualearth.net\/Branding\/logo_powered_by.png",
   "copyright":"Copyright © 2012 Microsoft and its suppliers. All rights reserved. This API cannot be accessed and the content and any results may not be used, reproduced or transmitted in any manner without express written permission from Microsoft Corporation.",
   "resourceSets":[
      {
         "estimatedTotal":1,
         "resources":[
            {
               "__type":"Location:http:\/\/schemas.microsoft.com\/search\/local\/ws\/rest\/v1",
               "bbox":[
                  33.940492293415652,
                  -118.26180800227225,
                  33.948217728557005,
                  -118.24939194889963
               ],
               "name":"1125 E 102ND St, Los Angeles, CA 90002",
               "point":{
                  "type":"Point",
                  "coordinates":[
                     33.944355010986328,
                     -118.25559997558594
                  ]
               },
               "address":{
                  "addressLine":"1125 E 102ND St",
                  "adminDistrict":"CA",
                  "adminDistrict2":"Los Angeles Co.",
                  "countryRegion":"United States",
                  "formattedAddress":"1125 E 102ND St, Los Angeles, CA 90002",
                  "locality":"Los Angeles",
                  "postalCode":"90002"
               },
               "confidence":"High",
               "entityType":"Address",
               "geocodePoints":[
                  {
                     "type":"Point",
                     "coordinates":[
                        33.944355010986328,
                        -118.25559997558594
                     ],
                     "calculationMethod":"Parcel",
                     "usageTypes":[
                        "Display"
                     ]
                  },
                  {
                     "type":"Point",
                     "coordinates":[
                        33.944118499755859,
                        -118.25559997558594
                     ],
                     "calculationMethod":"Interpolation",
                     "usageTypes":[
                        "Route"
                     ]
                  }
               ],
               "matchCodes":[
                  "Good"
               ]
            }
         ]
      }
   ],
   "statusCode":200,
   "statusDescription":"OK",
   "traceId":"81518ba504a3494bb0b62bdb6aa4b291|LTSM002104|02.00.83.500|LTSMSNVM001473, LTSMSNVM001463, LTSMSNVM001452, LTSMSNVM001851, LTSMSNVM001458, LTSMSNVM001462"
}

或者 ... 對於 XML 數據，添加o=xml ：

http://dev.virtualearth.net/REST/v1/Locations/US/1125%20E.%20102nd%20Street,%20Los%20Angeles,%20CA?o=xml&key=Ai9-KNy6Al-r_ueyLuLXFYB_GlPl-c-_iYtu16byW86qBx9uGbsdJpwvrP4ZUdgD

這使：

<Response>
  <Copyright>Copyright ? 2012 Microsoft and its suppliers. All rights reserved. This API cannot be accessed and the content and any results may not be used, reproduced or transmitted in any manner without express written permission from Microsoft Corporation.</Copyright>
  <BrandLogoUri>http://dev.virtualearth.net/Branding/logo_powered_by.png</BrandLogoUri>
  <StatusCode>200</StatusCode>
  <StatusDescription>OK</StatusDescription>
  <AuthenticationResultCode>ValidCredentials</AuthenticationResultCode>
  <TraceId>b9af8a6b058b455ca9c368b9e32142fe|LTSM002102|02.00.83.500|LTSMSNVM002001, LTSMSNVM001464, LTSMSNVM001451, LTSMSNVM001452, LTSMSNVM001457, LTSMSNVM002052, LTSMSNVM001461</TraceId>
  <ResourceSets>
    <ResourceSet>
      <EstimatedTotal>1</EstimatedTotal>
      <Resources>
        <Location>
          <Name>1125 E 102ND St, Los Angeles, CA 90002</Name>
          <Point>
            <Latitude>33.944355010986328</Latitude>
            <Longitude>-118.25559997558594</Longitude>
          </Point>
          <BoundingBox>
            <SouthLatitude>33.940492293415652</SouthLatitude>
            <WestLongitude>-118.26180800227225</WestLongitude>
            <NorthLatitude>33.948217728557005</NorthLatitude>
            <EastLongitude>-118.24939194889963</EastLongitude>
          </BoundingBox>
          <EntityType>Address</EntityType>
          <Address>
            <AddressLine>1125 E 102ND St</AddressLine>
            <AdminDistrict>CA</AdminDistrict>
            <AdminDistrict2>Los Angeles Co.</AdminDistrict2>
            <CountryRegion>United States</CountryRegion>
            <FormattedAddress>1125 E 102ND St, Los Angeles, CA 90002</FormattedAddress>
            <Locality>Los Angeles</Locality>
            <PostalCode>90002</PostalCode>
          </Address>
          <Confidence>High</Confidence>
          <MatchCode>Good</MatchCode>
          <GeocodePoint>
            <Latitude>33.944355010986328</Latitude>
            <Longitude>-118.25559997558594</Longitude>
            <CalculationMethod>Parcel</CalculationMethod>
            <UsageType>Display</UsageType>
          </GeocodePoint>
          <GeocodePoint>
            <Latitude>33.944118499755859</Latitude>
            <Longitude>-118.25559997558594</Longitude>
            <CalculationMethod>Interpolation</CalculationMethod>
            <UsageType>Route</UsageType>
          </GeocodePoint>
        </Location>
      </Resources>
    </ResourceSet>
  </ResourceSets>
</Response>

所以給定地址的經緯度是 (33.9, -118.2)

Answer 2

谷歌地圖有一個返回緯度/經度的網絡服務 API，適用於主要國家。 有關示例，請參見http://maps.google.com/maps/geo?q=1%205th%20ave,new%20york,ny,us 。 支持不同的輸出格式，包括 CSV、 http ://maps.google.com/maps/geo?q=1%205th% 20ave ,new%20york, ny ,us&output=csv、JSON 等。

我不熟悉 geocoder.us，但谷歌地圖絕對適用於美國地址。

編輯 1：有關支持的國家/地區列表，請參閱http://code.google.com/apis/maps/faq.html#whatcountries

編輯 2：為了獲得更大的相關性，以下是針對您的地址的示例 Google Maps API 調用： http : //maps.google.com/maps/geo?q=1125%20E.%20102nd%20Street,%20Los%20Angeles， %20CA

Answer 3

按地址獲取緯度和經度 - Microsoft BingMapsRESTToolkit

Microsoft 有一個官方的BingMapsRESTToolkit ，可幫助您輕松使用Bing Maps REST 服務。 為此，您需要安裝 BingMapsRESTToolkit NuGet 包。

在這里，您對GeocodeRequest感興趣以按地址獲取位置。 您可以通過將Query屬性設置為指定地址或將Address屬性設置為Address或SimpleAddress的實例來指定地址。

例子：

var request = new GeocodeRequest();
request.BingMapsKey = "Your Map Key";

request.Query = "The Postal address";

//OR
//request.Address = new SimpleAddress()
//{
//    CountryRegion = "The Country",
//    AddressLine = "The official street line of an address relative to the area",
//    AdminDistrict = "The subdivision name in the country or region for an address",
//    Locality = "The locality, such as the city or neighborhood", 
//    PostalCode = "The postal code",
//};

var result = await request.Execute();
if (result.StatusCode == 200)
{
    var toolkitLocation = (result?.ResourceSets?.FirstOrDefault())
        ?.Resources?.FirstOrDefault() as BingMapsRESTToolkit.Location;
    var latitude = toolkitLocation.Point.Coordinates[0];
    var longitude = toolkitLocation.Point.Coordinates[1];

    // Use latitude and longitude
}

更多信息：

• 入門
• BingMapsRESTToolkit API 參考
• 項目主頁
• BingMapsRESTToolkit NuGet 包
• 獲取 Bing 地圖密鑰