获取百度地图POI数据三(模拟关键词搜索)

使⽤关键词模拟百度地图的搜索功能从⽽获取返回的POI数据的⽅法能够获取⼤量的POI数据 由于返回的数据中没有百度经纬度坐标信息，只有百度墨卡托的坐标，所以还需要调⽤它的API 通过坐标转换的⽅⽅法来获取百度经纬度坐标。这就需要申请开发密钥了，⽽且每个密钥⼀天最多只能进⾏⼗万次的坐标转换。 以下是本⼈获取的部分POI数据：

以上就是本⼈获取百度地图POI数据的⽅式，由于关键词数量在百万级别 ⽽且百度每次返回的数据的页数也不近相同，多的有百页，少的仅有⼀条设置没有，所以程序需要运⾏很长的时间，本⼈运⾏两周程序也才获取到⼀百多万数据。预计程序运⾏完成时POI数据总量或与关键词总量相差⽆⼏，也能达到⼀百五⼗万左右，虽然并不知道百度地图上海地区的POI数据具体有多少，但是⼀百多万的数据量已经能够做些分析了。

2023年6月21日发(作者：)

获取百度地图POI数据三（模拟关键词搜索） 上⼀篇博⽂中讲到如何获取⽤于搜索的关键词，并且已经准备好了⼀百五⼗万的关键词 这其中有门牌号码，餐馆酒店名称，公司名称，道路名称等。有了这些数据，我们就可以通过代码，模拟我们在百度地图的搜索框中搜索地点，从⽽获取其返回的POI数据。下⾯直接上代码~ ⼀ 、准备好⽤于存储数据的数据库表　　 由于百度返回的POI数据都是JSON字符串且⼦节点⾮常多，为了按照⼦节点⼀⼀存储，就需要建这么⼀张包含很多字段的表，虽然⿇烦，但是信息很全⾯。当然各位也可以选择性的存储其中的数据。　　⼆、获取并解析数据的代码class Program { static string[] strArr = { "name", "addr", "address_norm", "alias", "aoi", "area_name", "brand_id", "cla", "di_tag", "ext_display", "geo", "indoor_pano", "navi_update_time", "new_catalog_id", "primary_uid", "show_tag", "std_tag", " static string[] flaArr = { "navi_x", "navi_y" }; static string[] intArr = { "acc_flag", "area", "biz_type", "catalogID", "click_flag", "detail", "diPointX", "diPointY", "dis", "dist2route", "dist2start", "ext_type", "f_flag", "father_son", "flag_type", "geo_type", "ismodified", "pano", "poiType static List tempList = new List(); static void Main(string[] args) {　　　　　　　//调⽤SQLHelper类中的⽅法 DataTable kwDt = eDataTable("select KWName from SHKW order by SaveTime", ); List kwList = new List(); foreach (DataRow row in ) { (row["KWName"].ToString()); }

int total = ; DataTable tempDt = eDataTable("select name,addr from SHPOI", ); foreach (DataRow row in ) { (row["name"].ToString() + "," + row["addr"].ToString()); } for (int i = 0; i < ; i++) { string kw = kwList[i]; string keyWord = "上海市" + kw; for (int j = 0; j < 200; j++) { string url = "/?newmap=1&reqflag=pcmap&biz=1&from=webmap&da_par=direct&pcevaname=pc4.1&qt=s&da_src=&wd=" + keyWord + "&c=289&pn=" + j; int count = DownloadPOIInfoFromBMap(url, -1, keyWord + j); if (count == -1) break; ine("成功写⼊数据：" + count + "条 执⾏次数：" + (j + 1) + " KeyWord：" + keyWord + " kwNum：" + (f(kw) + 1) + " tatal:" + total); } } ine("ok"); y(); } private static int DownloadPOIInfoFromBMap(string url, int typeId, string fileName) { int count = 0; Stream responseStream; string restring; try { HttpWebRequest request = (HttpWebRequest)(url); = "GET"; HttpWebResponse response = (HttpWebResponse)ponse(); responseStream = ponseStream(); StreamReader sr = new StreamReader(responseStream, t); restring = End(); } catch { ine("⽹络异常"); return count; } string[] strArr = (new string[] { "u" }, ); StringBuilder sb = new StringBuilder(); (strArr[0]); try { for (int i = 1; i < ; i++) { string code = strArr[i]; int value = 32(ing(0, 4), 16); (tFromUtf32(value)); if ( > 4) { (ing(4, - 4)); } } } catch { return count; } JObject jo; try { jo = (JObject)alizeObject(ng()); } catch {　　　　　　　　　//⼀些数据⽆法正确转换为json对象 需要特别处理 Regex regex = new Regex(""{"index_tag".*?"}""); //MatchCollection collection = s(ng()); string data = ng(); data = e(data, """"); try { jo = (JObject)alizeObject(data); } catch { Regex regex1 = new Regex(""{"shop_id".*?"}""); data = e(data, """"); try { jo = (JObject)alizeObject(data); } catch { try { ("⽆法构建JSON对象 "); llText(@"D:errorData" + fileName + ".txt", data); } catch { } return count; } } } return SavePOIToDB(jo, typeId); } private static int SavePOIToDB(JObject jo, int typeId) { int count = 0; try { if (jo["content"].Children().Count() == 0) return -1; } catch { if (jo != null) return -1; } foreach (JToken child in jo["content"].Children()) { List listParam = new List(); foreach (string s in strArr) { (new SqlParameter(@s, GetInfoString(s, child))); } foreach (string f in flaArr) { (new SqlParameter(@f, GetInfoString(f, child))); } foreach (string i in intArr) { (new SqlParameter(@i, GetInfoString(i, child))); } List coordinate = ConvertCoor(GetInfoInt("x", child), GetInfoInt("y", child)); (new SqlParameter(@"TypeId", typeId)); (new SqlParameter(@"lot_bdll", coordinate[0])); (new SqlParameter(@"lat_bdll", coordinate[1])); string tempStr = GetInfoString("name", child).Replace("'", "") + "," + GetInfoString("addr", child); if (ns(tempStr)) continue; (tempStr); string sql = "insert into SHPOI values(@Name,@acc_flag,@addr,@address_norm,@alias,@aoi,@area,@area_name,@biz_type,@brand_id,@catalogID,@cla,@click_flag,@detail,@diPointX,@diPointY,@di_tag,@dis,@dist2route,@d eNonQuery(sql, , y()); count++; } return count; } private static int GetInfoInt(string key, JToken jo) { try { return 32(jo[key].ToString()); } catch { return 0; } } private static float GetInfoFloat(string key, JToken jo) { try { return (jo[key].ToString()); } catch { return 0; } } private static string GetInfoString(string key, JToken jo) { try { return jo[key].ToString(); } catch { return ng(); } } ///