记录一个百度地图的矩形区域搜索算法

雨点打透心脏的1/2处 2021-12-18 23:31 427阅读 0赞

矩形区域其实就是x、y左右每次加一定数值，矩形有四个坐标。

例如深圳地区的矩形区域是：22.449954,22.866712,113.757547,114.640617  
然后每次从22.449954增加0.01一直到22.866712  
113.757547增加0.01一直到114.640617，  
两个循环组合出来的集合的所有坐标都遍历一遍。

List<string> urls = new List<string>()
    {
       "深圳：22.449954,22.866712,113.757547,114.640617", "上海：30.653783,31.464508,122.028092,120.800073",
       "广州：13.164045,23.637493,114.012045,122.615464", "北京：39.42608,41.100304,115.344699,117.525929",
       "珠海+中山：21.940065,22.615464,113.092827,113.706837", "莞惠：22.615464,23.656991,114.012045,114.89145",
       "佛山：22.587604,23.637493,112.396029,113.164045", "长三角：29.591461,32.917728,118.26412,122.265533",
       "环渤海区域：38.676867,40.153807,116.777389,118.906876"
    };              
    for (int k = 0; k < urls.Count; k++)
    {
        string query = urls[k].Split('：').First().Trim();
        string[] jweidus = urls[k].Split('：').Last().Split(',');
        if (jweidus.Length ==4)
        {
            for (double i = double.Parse(jweidus[0]); i <= double.Parse(jweidus[1]); i += 0.01)
            {
               for (double j = double.Parse(jweidus[2]); j <= double.Parse(jweidus[3]); j += 0.01)
               {
                  string JWD = i.ToString().Replace("000001", "").Replace("9999999", "") + "," +
                  j.ToString().Replace("000001", "").Replace("9999999", "");
                  string JWD1 = (i + 0.01).ToString().Replace("000001", "").Replace("9999999", "") + "," +
                  (j + 0.01).ToString().Replace("000001", "").Replace("9999999", "");
                  string LatLongitude = JWD + "," + JWD1;
              }
           }
        }
    }

通过这种算法我们可以做很多事情，调用对方的地图接口查询写字楼、餐厅、企业、园区等。