/// <summary>
/// 返回给定坐标点距离内的坐标；
/// </summary>
/// <returns></returns>
public static GpsRectangle GetRectange(Gps gps, decimal distance)
{
return(new GpsRectangle
{
Top = gps.Latitude - distance / jl_wd,
Bottom = gps.Latitude + distance / jl_wd,
Left = gps.Longtitude - distance / jl_wd,
Right = gps.Longtitude + distance / jl_wd
});
}
/// <summary>
/// 根据地址获得GPS的地理信息
/// 根据地址获得 坐标；注意，无法获取到建筑物,
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public static Gps GetGpsByAddress(string address)
{
string url = "{0}?address={2}&key={1}";
string urlreq = string.Format(url, new string[] { AMAP_GEO_URL, AMAP_APP_KEY, address });
string result = HttpUtil.ReadWeb(urlreq);
/*System.Web.Script.Serialization.JavaScriptSerializer ser
* = new System.Web.Script.Serialization.JavaScriptSerializer();
* {"status":"1","info":"OK","infocode":"10000","count":"1",
* "geocodes":[{"formatted_address":"北京市朝阳区方恒国际中心A座","province":"北京市","citycode":"010","city":"北京市",
* "district":"朝阳区","township":[],"neighborhood":{"name":[],"type":[]},
* "building":{"name":[],"type":[]},"adcode":"110105","street":[],"number":[],"location":"116.480690,39.989777","level":"门牌号"}]}
*/
/*
* 注意上面的建筑物有问题，所以需要根据坐标去进行重新解析;
*/
//ser.
var urlResult = Newtonsoft.Json.JsonConvert.DeserializeObject <Dictionary <string, object> >(result);
if (urlResult["status"].ToString() == "1")
{
var gps = new Gps();
var dic = (JArray)urlResult["geocodes"];
if (dic.Count > 0)
{
var jobject = (JObject)dic.First();
gps.address = (string)jobject["formatted_address"];
gps.province = (string)jobject["province"];
gps.city = (string)jobject["city"];
JToken district = jobject.GetValue("district");
if (district != null)
{
if (district.ToArray().Length > 0 || district.ToString() != "[]")
{
//"广东省东莞市南城区东莞大道11号台商大厦57楼" 居然无法获得地区;
gps.district = (string)jobject["district"];
}
}
if (gps.district == null)
{
gps.district = gps.city;
}
var location = ((string)jobject["location"]).Split(new char[] { ',' });
gps.Longtitude = Convert.ToDecimal(location[0]);
gps.Latitude = Convert.ToDecimal(location[1]);
}
return(gps);
}
return(null);
}
/// <summary>
/// 根据坐标获得GPS的地理信息
/// </summary>
/// <param name="longitude">坐标经度</param>
/// <param name="latitude">坐标纬度</param>
/// <returns></returns>
public static Gps GetGpsByCoodinate(decimal longitude, decimal latitude)
{
try
{
var coopirate = longitude.ToString() + "," + latitude.ToString();
//http://restapi.amap.com/v3/geocode/regeo?key=8726e94e521325daaee5b4738d83bb56&location=116.481488%2C39.990464
string url = "{0}?location={2}&key={1}";
if (!cooperateDictionary.ContainsKey(coopirate))
{
string urlreq = string.Format(url, new string[] { AMAP_REGEO_URL, AMAP_APP_KEY, coopirate });
string result = HttpUtil.ReadWeb(urlreq);
//System.Web.Script.Serialization.JavaScriptSerializer ser = new System.Web.Script.Serialization.JavaScriptSerializer();
var urlResult = Newtonsoft.Json.JsonConvert.DeserializeObject <Dictionary <string, object> >(result);
if (urlResult["status"].ToString() == "1")
{
/* {"status":"1","info":"OK","infocode":"10000",
* "regeocode":{"formatted_address":"北京市朝阳区望京街道阜通东大街6号",
* "addressComponent":{"province":"北京市","city":[],"citycode":"010","district":"朝阳区","adcode":"110105",
* "township":"望京街道","towncode":"110105026000",
* "neighborhood":{"name":"方恒国际中心","type":"商务住宅;楼宇;商住两用楼宇"},
* "building":{"name":"方恒国际中心B座","type":"商务住宅;楼宇;商务写字楼"},
* "streetNumber":{"street":"阜通东大街","number":"6号","location":"116.481077,39.9904942","direction":"西","distance":"35.1865"},
* "businessAreas":[{"location":"116.47089234140496,39.9976009239991","name":"望京","id":"110105"}]}}}
*/
var gps = new Gps();
var dic = (JObject)(urlResult["regeocode"]);
gps.address = (string)dic["formatted_address"];
var addressComponent = (JObject)(dic["addressComponent"]);
gps.province = (string)addressComponent["province"];
var city = GetValue(addressComponent["city"]);
gps.city = city ?? gps.province;
if (addressComponent["district"] is JArray)
{
var district = (JArray)addressComponent["district"];
if (district.Count() == 0)
{
gps.district = gps.city;
}
else
{
gps.district = (string)district[0];
}
}
else
{
gps.district = (string)addressComponent["district"];
}
// gps.township = (string) addressComponent["township"];
gps.Longtitude = longitude;
gps.Latitude = latitude;
var building = (JObject)(addressComponent["building"]);
/*{ "status":"1","info":"OK","infocode":"10000","regeocode":{ "formatted_address":"安徽省安庆市岳西县巍岭乡三道河","addressComponent":{ "province":"安徽省","city":"安庆市","citycode":"0556","district":"岳西县","adcode":"340828","township":"巍岭乡","towncode":"340828210000","neighborhood":{ "name":[],"type":[]
* },"building":{"name":[],"type":[]
* },"streetNumber":{"street":[],"number":[],"direction":[],"distance":[]},"businessAreas":[[]]}}}*/
gps.building = GetValue(building["name"]);
gps.buildingType = GetValue(building["type"]);
cooperateDictionary[coopirate] = gps;
return(gps);
}
else
{
return(null);
}
}
else
{
return(cooperateDictionary[coopirate]);
}
}
catch
{
return(null);
}
}
/// <summary>
/// 计算两个地方的距离;
/// </summary>
public static int CalculateDistance(Gps gpsa, Gps gpsb)
{
return((int)Math.Sqrt((Math.Pow((double)(jl_wd * Math.Abs(gpsa.Longtitude - gpsb.Longtitude)), 2)
+ Math.Pow((double)(jl_jd * Math.Abs(gpsa.Latitude - gpsb.Latitude)), 2))));
}