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GpsCardGatewayPosition
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GpsCardGatewayPosition/GpsCardGatewayPosition.Common/Helper/ChinaPolygon.cs

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  1. using Newtonsoft.Json;

  2. using System;

  3. using System.Collections.Generic;

  4. using System.Linq;

  5. using System.Text;

  6. using System.Threading.Tasks;

  7. 

  8. namespace GpsCardGatewayPosition.Common.Helper

  9. {

  10.     public class ChinaPolygon

  11.     {

  12.         private static readonly PolyGon China;

  13.         private const string ChinaStr = "{\"myPts\":[{\"X\":17.978733095556183,\"Y\":108.10546875},{\"X\":12.554563528593656,\"Y\":111.09374999999999},{\"X\":5.8783321096743268,\"Y\":110.390625},{\"X\":6.4026484059638964,\"Y\":115.13671875},{\"X\":11.178401873711785,\"Y\":117.59765625},{\"X\":15.284185114076445,\"Y\":118.828125},{\"X\":20.715015145512098,\"Y\":119.00390625},{\"X\":23.160563309048314,\"Y\":118.740234375},{\"X\":23.704894502324912,\"Y\":118.66333007812499},{\"X\":25.259600649162689,\"Y\":120.42663574218749},{\"X\":30.789036751261161,\"Y\":123.837890625},{\"X\":35.227672354935862,\"Y\":120.9814453125},{\"X\":37.142803443716836,\"Y\":123.53027343749999},{\"X\":39.639537564366684,\"Y\":124.1455078125},{\"X\":40.426042128264932,\"Y\":124.81018066406249},{\"X\":41.029643387166381,\"Y\":126.1285400390625},{\"X\":41.722130585125782,\"Y\":126.826171875},{\"X\":41.516803958101178,\"Y\":127.19970703125},{\"X\":41.335575973123895,\"Y\":127.76000976562501},{\"X\":41.53325414281322,\"Y\":128.441162109375},{\"X\":41.943148747326958,\"Y\":128.265380859375},{\"X\":41.975827261025728,\"Y\":129.0234375},{\"X\":42.366661663732742,\"Y\":129.781494140625},{\"X\":42.89206418807337,\"Y\":130.023193359375},{\"X\":42.455887641971657,\"Y\":130.4296875},{\"X\":42.89206418807337,\"Y\":131.2646484375},{\"X\":43.46886761482925,\"Y\":131.572265625},{\"X\":44.855868807357247,\"Y\":131.28662109375},{\"X\":45.120052841530544,\"Y\":131.9677734375},{\"X\":44.902577996288876,\"Y\":132.8466796875},{\"X\":45.073520606709707,\"Y\":133.30810546875},{\"X\":48.400032496106853,\"Y\":135.19775390625},{\"X\":48.560249791743288,\"Y\":134.89013671875},{\"X\":48.487486479884147,\"Y\":134.09912109375},{\"X\":47.872143968887308,\"Y\":131.46240234375},{\"X\":48.122101028190805,\"Y\":130.89111328125},{\"X\":48.603857608232524,\"Y\":130.9130859375},{\"X\":48.908059399650078,\"Y\":130.75927734375},{\"X\":49.023461463214126,\"Y\":130.58349609375},{\"X\":49.095452162534826,\"Y\":130.23193359375},{\"X\":49.653404588437894,\"Y\":129.5068359375},{\"X\":49.781264058178365,\"Y\":128.056640625},{\"X\":53.146770330850842,\"Y\":126.16699218749999},{\"X\":53.657661020298,\"Y\":123.79394531249999},{\"X\":53.514184520771131,\"Y\":120.89355468749999},{\"X\":52.776185688961711,\"Y\":119.81689453125},{\"X\":52.429222277955134,\"Y\":119.94873046875},{\"X\":52.482780222078226,\"Y\":120.52001953124999},{\"X\":49.710272582105695,\"Y\":117.79541015625001},{\"X\":50.233151832472245,\"Y\":116.16943359374999},{\"X\":48.034019158642863,\"Y\":115.26855468749999},{\"X\":47.502358951968574,\"Y\":115.8837890625},{\"X\":47.694974341862817,\"Y\":118.54248046874999},{\"X\":46.815098645992428,\"Y\":119.68505859375},{\"X\":46.98025235521883,\"Y\":118.63037109375},{\"X\":46.709735944071568,\"Y\":117.3779296875},{\"X\":46.468132992155539,\"Y\":116.5869140625},{\"X\":45.552525251340128,\"Y\":115.31249999999999},{\"X\":45.552525251340128,\"Y\":114.60937499999999},{\"X\":44.840290651397993,\"Y\":113.44482421875},{\"X\":45.243953422623242,\"Y\":111.99462890625},{\"X\":45.073520606709707,\"Y\":111.59912109375},{\"X\":44.308126684886126,\"Y\":111.07177734375},{\"X\":43.78695837311561,\"Y\":111.73095703125},{\"X\":42.8115217450979,\"Y\":109.9951171875},{\"X\":42.585444257384907,\"Y\":107.55615234375},{\"X\":41.787697005390633,\"Y\":104.9853515625},{\"X\":42.779275360241904,\"Y\":100.634765625},{\"X\":42.908160071960538,\"Y\":96.5478515625},{\"X\":44.370986962971728,\"Y\":95.51513671875},{\"X\":44.386691502152061,\"Y\":95.09765625},{\"X\":45.104546309768729,\"Y\":93.40576171875},{\"X\":45.305802599435779,\"Y\":91.20849609375},{\"X\":45.828799251921339,\"Y\":90.94482421875},{\"X\":46.815098645992428,\"Y\":91.16455078125},{\"X\":48.048709942886859,\"Y\":90.175781249999986},{\"X\":48.1367666796927,\"Y\":89.208984374999986},{\"X\":49.210420445650286,\"Y\":87.890625},{\"X\":49.23912083246698,\"Y\":86.7919921875},{\"X\":48.661942846070062,\"Y\":86.46240234375},{\"X\":48.472921272487824,\"Y\":85.62744140625},{\"X\":48.10743118848039,\"Y\":85.341796875},{\"X\":47.189712464484209,\"Y\":85.4296875},{\"X\":47.055154085503482,\"Y\":85.0341796875},{\"X\":47.428087261714253,\"Y\":82.96875},{\"X\":45.767522962149904,\"Y\":82.067871093749986},{\"X\":45.352145245851773,\"Y\":82.309570312499986},{\"X\":45.475540271585928,\"Y\":81.80419921875},{\"X\":44.980342380849727,\"Y\":79.73876953125},{\"X\":43.277205322120238,\"Y\":80.617675781249986},{\"X\":43.100982876188546,\"Y\":80.26611328125},{\"X\":42.924251753870685,\"Y\":80.31005859375},{\"X\":42.763145866894916,\"Y\":80.09033203125},{\"X\":42.163403424224008,\"Y\":80.04638671875},{\"X\":41.11246878918088,\"Y\":77.40966796875},{\"X\":41.1290213474951,\"Y\":76.79443359375},{\"X\":40.547200234410489,\"Y\":76.35498046875},{\"X\":40.480381429081717,\"Y\":75.893554687499986},{\"X\":40.780541431860307,\"Y\":75.5419921875},{\"X\":40.597270634420269,\"Y\":74.8388671875},{\"X\":40.128491056854081,\"Y\":73.8720703125},{\"X\":39.453161128073937,\"Y\":73.49853515625},{\"X\":38.496593518947556,\"Y\":73.69628906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  14. 

  15.         static ChinaPolygon()

  16.         {

  17.             China = JsonConvert.DeserializeObject<PolyGon>(ChinaStr);

  18.         }

  19. 

  20.         public static bool IsInChina(double lat, double lng)

  21.         {

  22.             return China.FindPoint(lat, lng);

  23.         }

  24.         /// <summary>

  25.         /// 

  26.         /// </summary>

  27.         private class Point

  28.         {

  29.             public double X { get; set; } = 0;

  30.             public double Y { get; set; } = 0;

  31.         }

  32.         /// <summary>

  33.         /// 

  34.         /// </summary>

  35.         private class PolyGon

  36.         {

  37.             public List<Point> myPts = new List<Point>();

  38.             public PolyGon()

  39.             {

  40.             }

  41.             public PolyGon(List<Point> points)

  42.             {

  43.                 foreach (Point p in points)

  44.                 {

  45.                     myPts.Add(p);

  46.                 }

  47.             }

  48.             public void Add(Point p)

  49.             {

  50.                 myPts.Add(p);

  51.             }

  52. 

  53.             private int Count()

  54.             {

  55.                 return myPts.Count;

  56.             }

  57. 

  58. 

  59.             //  The function will return true if the point x,y is inside the polygon, or

  60.             //  false if it is not.  If the point is exactly on the edge of the polygon,

  61.             //  then the function may return true or false.

  62. 

  63.             public bool FindPoint(double X, double Y)

  64.             {

  65.                 int sides = Count() - 1;

  66.                 int j = sides - 1;

  67.                 bool pointStatus = false;

  68.                 for (int i = 0; i < sides; i++)

  69.                 {

  70.                     if (myPts[i].Y < Y && myPts[j].Y >= Y || myPts[j].Y < Y && myPts[i].Y >= Y)

  71.                     {

  72.                         if (myPts[i].X + (Y - myPts[i].Y) / (myPts[j].Y - myPts[i].Y) * (myPts[j].X - myPts[i].X) < X)

  73.                         {

  74.                             pointStatus = !pointStatus;

  75.                         }

  76.                     }

  77.                     j = i;

  78.                 }

  79.                 return pointStatus;

  80.             }

  81.         }

  82.     }

  83. }