在上一篇文章中，街景影像采样点已经被生成。如此，我们可以根据这些采样点，从公开接口抓取街景影像。

百度地图公开接口原理

街景影像接口

使用F12开发者工具，查看百度地图街景返回的接口，可以发现
https://mapsv0.bdimg.com/?qt=pr3d能够返回街景影像
该url其余主要参数包括

width height 返回的街景影像宽度高度
fovy 平面视角覆盖的角度
heading 镜头朝向（顺时针方向与正北方向的夹角）
pitch 俯仰角
panoid 最为关键的：街景影像的唯一ID

由此可知，若想批量获取已知点位的街景影像，需要首先获取这些采样点的panoid

街景影像元数据接口

在百度地图上查看街景时，除返回影像本身外，还返回了街景影像元数据。观察可知元数据中包含了panoid。在这里插入图片描述

url为 https://mapsv0.bdimg.com/?qt=sdata
访问该url最关键的参数为

udt 日期
sid 坐标的对应的sid

将返回的内容与街景影像接口返回的内容比较，发现最为关键的返回内容为

[‘content’][0][‘MoveDir’] 街景所属的道路的朝向
[‘content’][0][‘TimeLine’][0][‘ID’] 拍摄时间与作为参数的日期最为接近的街景影像的panoid

进一步可以发现，如果采样点处只有一个时间点的街景影像，sid就是panoid。否则一个sid可能对应多个panoid。
如此可知，想要通过采样点获取街景影像，需要先获取采样点的SID。

坐标转SID接口

该接口同样在浏览街景影像时返回内容中。
url为 https://mapsv0.bdimg.com/?qt=qsdata 在这里插入图片描述
关键参数只有xy坐标。经验证后确认该xy坐标为百度地图墨卡托坐标。

工作流

在确定了上述三个接口的用途后，我们可以确定如下获取街景影像的流程：

WGS1984坐标转bd09坐标
bd09坐标转墨卡托坐标
通过qsdata接口获取采样点对应的sid
通过sid获取某些时间的panoid
通过panoid获取街景影像

代码

设置main函数中的参数可以直接运行，环境Python3.7。

import requests, json, re, os, random, time, math

x_pi = 3.14159265358979324 * 3000.0 / 180.0
pi = 3.1415926535897932384626 # π
a = 6378245.0 # 长半轴
ee = 0.00669342162296594323 # 扁率
#百度墨卡托投影纠正矩阵
LLBAND =[75, 60, 45, 30, 15, 0]
LL2MC = [[-0.0015702102444, 111320.7020616939, 1704480524535203, -10338987376042340, 26112667856603880, -35149669176653700, 26595700718403920, -10725012454188240, 1800819912950474, 82.5],
         [0.0008277824516172526, 111320.7020463578, 647795574.6671607, -4082003173.641316, 10774905663.51142, -15171875531.51559, 12053065338.62167, -5124939663.577472, 913311935.9512032, 67.5],
         [0.00337398766765, 111320.7020202162, 4481351.045890365, -23393751.19931662, 79682215.47186455, -115964993.2797253, 97236711.15602145, -43661946.33752821, 8477230.501135234, 52.5],
         [0.00220636496208, 111320.7020209128, 51751.86112841131, 3796837.749470245, 992013.7397791013, -1221952.21711287, 1340652.697009075, -620943.6990984312, 144416.9293806241, 37.5],
         [-0.0003441963504368392, 111320.7020576856, 278.2353980772752, 2485758.690035394, 6070.750963243378, 54821.18345352118, 9540.606633304236, -2710.55326746645, 1405.483844121726, 22.5],
         [-0.0003218135878613132, 111320.7020701615, 0.00369383431289, 823725.6402795718, 0.46104986909093, 2351.343141331292, 1.58060784298199, 8.77738589078284, 0.37238884252424, 7.45]]
# 百度墨卡托转回到百度经纬度纠正矩阵
MCBAND = [12890594.86, 8362377.87, 5591021, 3481989.83, 1678043.12, 0]
MC2LL = [[1.410526172116255e-8, 0.00000898305509648872, -1.9939833816331, 200.9824383106796, -187.2403703815547, 91.6087516669843, -23.38765649603339, 2.57121317296198, -0.03801003308653, 17337981.2],
      [-7.435856389565537e-9, 0.000008983055097726239, -0.78625201886289, 96.32687599759846, -1.85204757529826, -59.36935905485877, 47.40033549296737, -16.50741931063887, 2.28786674699375, 10260144.86],
      [-3.030883460898826e-8, 0.00000898305509983578, 0.30071316287616, 59.74293618442277, 7.357984074871, -25.38371002664745, 13.45380521110908, -3.29883767235584, 0.32710905363475, 6856817.37],
      [-1.981981304930552e-8, 0.000008983055099779535, 0.03278182852591, 40.31678527705744, 0.65659298677277, -4.44255534477492, 0.85341911805263, 0.12923347998204, -0.04625736007561, 4482777.06],
      [3.09191371068437e-9, 0.000008983055096812155, 0.00006995724062, 23.10934304144901, -0.00023663490511, -0.6321817810242, -0.00663494467273, 0.03430082397953, -0.00466043876332, 2555164.4],
      [2.890871144776878e-9, 0.000008983055095805407, -3.068298e-8, 7.47137025468032, -0.00000353937994, -0.02145144861037, -0.00001234426596, 0.00010322952773, -0.00000323890364, 826088.5]]
def gcj02tobd09(lng, lat):
    """
    火星坐标系(GCJ02)转百度坐标系(BD09)
    :param lng:火星坐标经度
    :param lat:火星坐标纬度
    :return:
    """
    z = math.sqrt(lng * lng + lat * lat) + 0.00002 * math.sin(lat * x_pi)
    theta = math.atan2(lat, lng) + 0.000003 * math.cos(lng * x_pi)
    bd_lng = z * math.cos(theta) + 0.0065
    bd_lat = z * math.sin(theta) + 0.006
    return [bd_lng, bd_lat]
 
def bd09togcj02(bd_lon, bd_lat):
    """
    百度坐标系(BD09)转火星坐标系(GCJ02)
    :param bd_lat:百度坐标纬度
    :param bd_lon:百度坐标经度
    :return:转换后的坐标列表形式
    """
    x = bd_lon - 0.0065
    y = bd_lat - 0.006
    z = math.sqrt(x * x + y * y) - 0.00002 * math.sin(y * x_pi)
    theta = math.atan2(y, x) - 0.000003 * math.cos(x * x_pi)
    gg_lng = z * math.cos(theta)
    gg_lat = z * math.sin(theta)
    return [gg_lng, gg_lat]
 
def wgs84togcj02(lng, lat):
    """
    WGS84转GCJ02(火星坐标系)
    :param lng:WGS84坐标系的经度
    :param lat:WGS84坐标系的纬度
    :return:
    """
    if out_of_china(lng, lat): # 判断是否在国内
        return lng, lat
    dlat = transformlat(lng - 105.0, lat - 35.0)
    dlng = transformlng(lng - 105.0, lat - 35.0)
    radlat = lat / 180.0 * pi
    magic = math.sin(radlat)
    magic = 1 - ee * magic * magic
    sqrtmagic = math.sqrt(magic)
    dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * pi)
    dlng = (dlng * 180.0) / (a / sqrtmagic * math.cos(radlat) * pi)
    mglat = lat + dlat
    mglng = lng + dlng
    return [mglng, mglat]
 
def wgstobd09(lon, lat):
    tmplon, tmplat = wgs84togcj02(lon, lat)
    return gcj02tobd09(tmplon, tmplat)

def wgstobdmc(lon, lat):
    tmplon, tmplat = wgstobd09(lon, lat)
    return bd09tomercator(tmplon, tmplat)
 
def gcj02towgs84(lng, lat):
    """
    GCJ02(火星坐标系)转GPS84
    :param lng:火星坐标系的经度
    :param lat:火星坐标系纬度
    :return:
    """
    if out_of_china(lng, lat):
        return lng, lat
    dlat = transformlat(lng - 105.0, lat - 35.0)
    dlng = transformlng(lng - 105.0, lat - 35.0)
    radlat = lat / 180.0 * pi
    magic = math.sin(radlat)
    magic = 1 - ee * magic * magic
    sqrtmagic = math.sqrt(magic)
    dlat = (dlat * 180.0) / ((a * (1 - ee)) / (magic * sqrtmagic) * pi)
    dlng = (dlng * 180.0) / (a / sqrtmagic * math.cos(radlat) * pi)
    mglat = lat + dlat
    mglng = lng + dlng
    return [lng * 2 - mglng, lat * 2 - mglat]
 
def transformlat(lng, lat):
    ret = -100.0 + 2.0 * lng + 3.0 * lat + 0.2 * lat * lat + 0.1 * lng * lat + 0.2 * math.sqrt(math.fabs(lng))
    ret += (20.0 * math.sin(6.0 * lng * pi) + 20.0 *math.sin(2.0 * lng * pi)) * 2.0 / 3.0
    ret += (20.0 * math.sin(lat * pi) + 40.0 *
    math.sin(lat / 3.0 * pi)) * 2.0 / 3.0
    ret += (160.0 * math.sin(lat / 12.0 * pi) + 320 *
    math.sin(lat * pi / 30.0)) * 2.0 / 3.0
    return ret
 
def transformlng(lng, lat):
    ret = 300.0 + lng + 2.0 * lat + 0.1 * lng * lng + 0.1 * lng * lat + 0.1 * math.sqrt(math.fabs(lng))
    ret += (20.0 * math.sin(6.0 * lng * pi) + 20.0 *math.sin(2.0 * lng * pi)) * 2.0 / 3.0
    ret += (20.0 * math.sin(lng * pi) + 40.0 *math.sin(lng / 3.0 * pi)) * 2.0 / 3.0
    ret += (150.0 * math.sin(lng / 12.0 * pi) + 300.0 *math.sin(lng / 30.0 * pi)) * 2.0 / 3.0
    return ret
 
def out_of_china(lng, lat):
    """
    判断是否在国内，不在国内不做偏移
    :param lng:
    :param lat:
    :return:
    """
    if lng < 72.004 or lng > 137.8347:
        return True
    if lat < 0.8293 or lat > 55.8271:
        return True
    return False
 
def wgs84tomercator(lng,lat):
    """
    wgs84投影到墨卡托
    :param lng:
    :param lat:
    :return:
    """
    x = lng * 20037508.34 / 180
    y = math.log(math.tan((90 + lat) * math.pi / 360)) / (math.pi / 180) * 20037508.34 / 180
    return x,y
def mercatortowgs84(x,y):
    """
    墨卡托投影坐标转回wgs84
    :param x:
    :param y:
    :return:
    """
    lng = x / 20037508.34 * 180
    lat = 180 / math.pi * (2 * math.atan(math.exp(y / 20037508.34 * 180 * math.pi / 180)) - math.pi / 2)
    return lng,lat
 
def getRange(cC, cB, T):
    if (cB != None):
        cC = max(cC, cB)
    if (T != None):
        cC = min(cC, T)
    return cC
 
def getLoop(cC, cB, T):
    while (cC > T):
        cC -= T - cB
    while (cC < cB):
        cC += T - cB
    return cC
 
def convertor(cC, cD):
    if (cC==None or cD==None):
        print('null')
        return None
    T = cD[0] + cD[1] * abs(cC.x)
    cB = abs(cC.y) / cD[9]
    cE = cD[2] + cD[3] * cB + cD[4] * cB * cB +cD[5] * cB * cB * cB + cD[6] * cB * cB * cB * cB +cD[7] * cB * cB * cB * cB * cB +cD[8] * cB * cB * cB * cB * cB * cB
    if(cC.x<0):
        T=T*-1
    else:
        T=T
    if(cC.y<0):
        cE=cE*-1
    else:
        cE=cE
    return [T, cE]
 
def convertLL2MC(T) :
    cD=None
    T.x = getLoop(T.x, -180, 180)
    T.y = getRange(T.y, -74, 74)
    cB = T
    for cC in range(0,len(LLBAND),1):
        if (cB.y >= LLBAND[cC]) :
            cD = LL2MC[cC]
            break
    if (cD!=None) :
        for cC in range(len(LLBAND) - 1,-1,-1):
            if (cB.y <= -LLBAND[cC]):
                cD = LL2MC[cC]
                break
    cE = convertor(T, cD)
    return cE
 
def convertMC2LL(cB):
    cC=LLT(abs(cB.x),abs(cB.y))
    cE=None
    for cD in range(0,len(MCBAND),1):
        if (cC.y >= MCBAND[cD]) :
            cE = MC2LL[cD]
            break
    T = convertor(cB, cE)
    return T
 
def bd09tomercator(lng,lat):
    """
    bd09投影到百度墨卡托
    :param lng:
    :param lat:
    :return:
    """
    baidut=LLT(lng,lat)
    return convertLL2MC(baidut)
def mercatortobd09(x,y):
    """
    墨卡托投影坐标转回bd09
    :param x:
    :param y:
    :return:
    """
    baidut=LLT(x,y)
    return convertMC2LL(baidut)
 
class LLT:
    def __init__(self,x,y):
        self.x=x
        self.y=y
 
def Random_choose_useragent():

    ualist = ['Opera/9.80 (Windows NT 6.1; U; cs) Presto/2.7.62 Version/11.01', 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2919.83 Safari/537.36', 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.67 Safari/537.36',
            'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2656.18 Safari/537.36', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.124 Safari/537.36', 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1866.237 Safari/537.36', 
            'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36', 'Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 5.0; Trident/4.0; InfoPath.1; SV1; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 3.0.04506.30)', 'Mozilla/5.0 (X11; Linux; rv:74.0) Gecko/20100101 Firefox/74.0', 'Mozilla/5.0 (X11; CrOS i686 4319.74.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.57 Safari/537.36', 
            'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.517 Safari/537.36', 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.36', 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.13; ko; rv:1.9.1b2) Gecko/20081201 Firefox/60.0', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2866.71 Safari/537.36', 
            'Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1667.0 Safari/537.36',  'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20130401 Firefox/31.0', 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2919.83 Safari/537.36', 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.67 Safari/537.36', 
            'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2226.0 Safari/537.36', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.36', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.36', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1664.3 Safari/537.36', 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.62 Safari/537.36', 
            'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.36', 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2049.0 Safari/537.36', 'Mozilla/5.0 (X11; CrOS i686 4319.74.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.57 Safari/537.36', 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36', 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)', 
            'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.2 Safari/537.36', 'Mozilla/5.0 (X11; Ubuntu; Linux i686 on x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2820.59 Safari/537.36', 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_6; zh-cn) AppleWebKit/533.20.25 (KHTML, like Gecko) Version/5.0.4 Safari/533.20.27', 'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2226.0 Safari/537.36', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.124 Safari/537.36', 
            'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2656.18 Safari/537.36', 'Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1667.0 Safari/537.36', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2866.71 Safari/537.36', 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_5; ar) AppleWebKit/533.19.4 (KHTML, like Gecko) Version/5.0.3 Safari/533.19.4', 'Opera/9.80 (Windows NT 5.2; U; ru) Presto/2.7.62 Version/11.01', 'Mozilla/5.0 (X11; OpenBSD i386) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36', 
            'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.47 Safari/537.36', 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36', 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.67 Safari/537.36', 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.2117.157 Safari/537.36', 'Mozilla/4.0 (Compatible; MSIE 8.0; Windows NT 5.2; Trident/6.0)', 
            'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.36', 'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.17 Safari/537.36', 'Mozilla/5.0 (Windows; U; Windows NT 5.1; ja-JP) AppleWebKit/533.20.25 (KHTML, like Gecko) Version/5.0.3 Safari/533.19.4', 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36', 
            'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36', 'Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1467.0 Safari/537.36']
    headers = {
        'User-Agent': random.choice(ualist)}
    return headers


def xy_to_sid(x, y, input_params):

    params = {
        "udt": input_params['date'],
        "action": 0,
        'x': x,
        'y': y,
        'l': 18.367179030452565,
        "mode": 'day',
        't': 1553246985040,
        'fn': 'jsonp69972182',
        'qt':'qsdata'
    }     

    try:
        r = requests.get("https://mapsv0.bdimg.com/?", params, headers = input_params['headers'], timeout = (3,7))
        str1 = str(r.content, encoding = "utf8")
        jsonstr = str1.split('(')[1].split(')')[0]
        j = json.loads(jsonstr)
        if j["result"]["error"] == 0:
            sid = j['content']['id']
            return sid
        else:#如果error不为0，说明这个坐标点没有街景影像
            print("无街景")
            return -1
    except Exception as e:
        print("x,y to sid失败！")
        print(str(e))


# sid to datetime  sid得到时间轴，通过时间轴抓取对应时间的图像
# 输入参数分别 点对应的sid，百度坐标x，y，点序号
def sid_to_date_img(sid, trueX, trueY, wgslon, wgslat, rid, input_params):
    bdsid_param = {
        'sid': sid,
        'pc':1,
        'udt': input_params['date'],
        'fn': 'jsonp.p3991630',
        'qt':'sdata'
    }
    try:
        # 一个采样点可能有在数个时间点采集的街景影像，这里根据采样点标识ID获取最新的采样点-时间标识ID
        # 同时获取采样点对应的道路的走向，以获得视角与道路走向平行或垂直的街景影像
        r = requests.get("https://mapsv0.bdimg.com/?", bdsid_param, headers = input_params['headers'], timeout = (3,7))
        str1 = str(r.content, encoding = "utf8")
        p2 = re.compile(r'[(](.*)[)]', re.S)  # 贪婪匹配
        jsonstr2 = str(re.findall(p2, str1)[0])
        j = json.loads(jsonstr2)
        direction = float(j['content'][0]['MoveDir'])   # 获取道路的方位
        timeid =  j['content'][0]['TimeLine'][0]['ID']
        #遍历希望获取的数个方向
        for head in input_params['directions']:
            bdimg_params = {
                'fovy': 90,
                'quality': 100,
                'panoid': timeid,     # panoid 与sid对应
                'heading': (head+direction)%360,
                'width': 512,
                'height': 512,
                'qt':'pr3d'
            }
            try:
                r = requests.get("https://mapsv0.bdimg.com/?", bdimg_params,  headers = input_params['headers'], timeout = (3,7))
            except Exception as e:
                print(str(e))
            #如果获取成功，就保存影像
            if r.headers['Content-Type'] == 'image/jpeg':
                savedir = f"{input_params['outpath']}/{rid}"
                savepath = f"{savedir}/{rid}_{wgslon}_{wgslat}_{head}.png"
                if not os.path.exists(savedir):
                    os.makedirs(savedir)
                open(savepath, 'wb').write(r.content)
        #写日志
        with open('xy_sid2.txt', 'a') as f:
            f.write("{0},{1},{2}\n".format(trueX, trueY, timeid))

        with open('error2.txt', 'a')  as f:# 记录抓到第几个街景
            f.write("{0},{1},{2}\n".format(rid, trueX, trueY))
            
    except Exception as e:
        print("sid to img失败！")
        print(str(e))

        
# 百度坐标得到街景图片
# 参数 百度坐标X、Y、点序号
def xy_to_img(x, y, lon, lat, rid, input_params):
    sid = xy_to_sid(x, y, input_params)#先根据坐标获取街景采样点的唯一标识ID
    if sid != -1:
        sid_to_date_img(sid, x, y, lon, lat, rid, input_params)
        print(rid)
        
# 输入经纬度得到街景相片
# 参数 经度、纬度、点序号
def lon_lat_to_img(lon, lat, rid, input_params):
    x, y = wgstobdmc(lon, lat)#先将WGS1984坐标转为百度墨卡托坐标
    xy_to_img(x, y, lon, lat, rid, input_params)#使用百度墨卡托坐标获取街景影像

def ReadRID(filename):
    if not os.path.exists(filename):
        f = open(filename, 'w')
        f.close()
        return 1
    with open(filename, 'r') as f:
        num_str = f.readlines()[-1]
        num = int(num_str.split(',')[0])
    return num

if __name__ == '__main__':
    # 输出图片位置
    input_params = {
        'outpath':'pics',#存放街景影像的输出路径
        'directions':[0, 90, 180, 270],#获取的方向
        'headers':Random_choose_useragent(),#请求头
        'date':time.strftime("%Y%m%d", time.localtime()) ,
    }
    outpath = "pics"
    if not os.path.exists(outpath):
        os.mkdir(outpath)
    filelist = os.listdir(outpath)
    # 打开坐标csv文件
    with open('gzp.csv', 'r') as data:
        lines = data.readlines()[1:]
        for line in lines:
            line = line.strip()
            rid = line.split(',')[0]
            wgslon = float(line.split(',')[1])
            wgslat = float(line.split(',')[2])
            if rid not in filelist:  # 已有直接跳过
                s = time.time()
                if random.random() < 0.2:  # 0.2 的概率需要sleep
                    time.sleep(random.random()*2) # 随机休息0-2秒
                try:
                    lon_lat_to_img(wgslon, wgslat, rid, input_params)
                except Exception as e:
                    print(rid,repr(e))

街景影像分析入门（二）无需秘钥，抓取百度街景影像

百度地图公开接口原理

街景影像接口

街景影像元数据接口

坐标转SID接口

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代码

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