从谷歌街景提取depthmap

Question

许多像这样的帖子使用谷歌街景的REST API，如下所示：

http://maps.google.com/cbk?output=xml&ll=40.7625000,-73.9741670&dm=1

但是，此API有时不起作用。

谷歌街景似乎并不依赖于REST API，它可能会将depthmap存储在这个元小说中：

https://www.google.com/maps/photometa/v1?authuser=0&hl=en&gl=us&pb=!1m4!1smaps_sv.tactile!11m2!2m1!1b1!2m2!1sen!2sus!3m3!1m2!1e2!2sG2__WfQLZTzrsr7FP1wUyQ!4m57!1e1!1e2!1e3!1e4!1e5!1e6!1e8!1e12!2m1!1e1!4m1!1i48!5m1!1e1!5m1!1e2!6m1!1e1!6m1!1e2!9m36!1m3!1e2!2b1!3e2!1m3!1e2!2b0!3e3!1m3!1e3!2b1!3e2!1m3!1e3!2b0!3e3!1m3!1e8!2b0!3e3!1m3!1e1!2b0!3e3!1m3!1e4!2b0!3e3!1m3!1e10!2b1!3e2!1m3!1e10!2b0!3e3

但我不知道如何从中提取depthmap。在这篇将谷歌街景的深度图(Base64(转换为图像的帖子中使用Base64的方法不起作用，因为编码的字符串非常不同。

有人能给我一些主意吗？非常感谢！

以下是从谷歌街景获取元文件的一些Python代码行：

def getPanoJS_frm_lonlat(lon, lat):
url = "https://maps.googleapis.com/maps/api/js/GeoPhotoService.SingleImageSearch?pb=!1m5!1sapiv3!5sUS!11m2!1m1!1b0!2m4!1m2!3d{0:}!4d{1:}!2d50!3m10!2m2!1sen!2sGB!9m1!1e2!11m4!1m3!1e2!2b1!3e2!4m10!1e1!1e2!1e3!1e4!1e8!1e6!5m1!1e2!6m1!1e2&callback=_xdc_._v2mub5"
url = url.format(lat, lon)
return requests.get(url, proxies=None)
lon = -74.2249174
lat = 40.7040015
resp = getPanoJS_frm_lonlat(lon, lat)
line = resp.text.replace("/**/_xdc_._v2mub5 && _xdc_._v2mub5( ", "")[:-2]
# print(line)
jdata = json.loads(line)
print("This part may be the depthmap:")
print(jdata[1][5][0][5][3][2])

元文件中编码的depthmap的一部分(不太确定，并且整个字符串太长，无法发布在这里，请使用上面的代码下载元文件(：

Q0RrQUFBSUFBUWdCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUURUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFFQkFRRUJBUUVCQVFRlZyZDFsalYwWmtVVGxoUlUxQmJYazRlaTFKYVdoMlZHYzJhbWhzZVVwNFJrNVNaRWRMYjNObFdVNWhVVk4zUXkxblJtTTBhM2hLYjFWTllYSTBjRFJtTmxOUFp6TnhRWEJ4VkRkSVVtaHVZMGN0T1Uxa1ptMXNXR2MzZDB4MVVGSkdVVVpOVEdRNGNIcFZSMWxSUkRoM0FBQUFBQUFBQUlBaWVzbTlzWFVnd1M3QzBUeXpzeHRCa0FHaE84WThtRUVxaENTX0lCRDN3Y1RYV3I3UkthTEJuZElYd0h0MkpzSmVZd0ZBZjM5Q3dzZjhjc0F2dGt2Q2VzV3d2X1dkY01JOTNRVEJsVGxBd2lKNlJzTEk4empDZVpKdHdvcXNPTUtvOXV6QnJzVTV3cDZNaXNMVDR6akNramtmd2h0U09jTFZaR2pDeUJBalF0cUZKOFBhS3pyQ01TM0N3dHp5SlVMUjF0WENmdklsUWl4WE1jT3I4ampDUGVjVXd1djJIMExfMk11OXJYN2dRUXJ6UHNKT2pBRkRES0dUdjRLdm0wTElEWnFfZG5HR1FnbGM1OEgwRUI1Q1BHU2V3WU1aSFVLV0xxSEI0eWdJd3lPakZjTEIwUUZEa2xGZHYzY1ZzRUl1RmtlX1RLRmhRc21tenJ3QjZUUkQxNThDdjdXZ3cwSkc5NEUtZXhUb1F1c1QzVUdUYmdKRGtlMzJRV2gtSDBJUjc2VkJUOFVlUWg3RkZFS3ViUUpERFlzalFvYzJJRUpTUTB0Q1RCd2dRbEhJY2tMV3RSOUNNVktiUVRGcVBNS1dIZVpCb2ZZOXdpQmFRRUowNTBIQ0Jud1pRcDV6UU1MNml0Q18wWWFjd3V6RG5FSTNFd25EZUNZc1FlODhQTUl1dThDX2tFLUt3dTF4RDhETVBzUEM0aGhCd241Z0lrSThfSG9fOTRRMFFwOExKa0ZoZUI1QzE3OTN3T3VORkVMSEQ1akJRZnM2d2c=

Answer 1

我最近也遇到了这个问题，我决定在朋友的帮助下深入研究。

我发现GSVPanoDepth.js库已经有一段时间没有更新了，但它仍然具备解码和解析数据的基本功能。除了url和数据结构发生了变化外，其他都差不多。我分叉了repo并更新了它以使用新的url和结构-https://github.com/sidequestlegend/GSVPanoDepth.js

// This url no longer works
// url = "http://maps.google.com/cbk?output=json&cb_client=maps_sv&v=4&dm=1&pm=1&ph=1&hl=en&panoid=" + panoId;
url = "https://www.google.com/maps/photometa/v1?authuser=0&hl=en&gl=uk&pb=!1m4!1smaps_sv.tactile!11m2!2m1!1b1!2m2!1sen!2suk!3m3!1m2!1e2!2s" +
panoId +
"!4m57!1e1!1e2!1e3!1e4!1e5!1e6!1e8!1e12!2m1!1e1!4m1!1i48!5m1!1e1!5m1!1e2!6m1!1e1!6m1!1e2!9m36!1m3!1e2!2b1!3e2!1m3!1e2!2b0!3e3!1m3!1e3!2b1!3e2!1m3!1e3!2b0!3e3!1m3!1e8!2b0!3e3!1m3!1e1!2b0!3e3!1m3!1e4!2b0!3e3!1m3!1e10!2b1!3e2!1m3!1e10!2b0!3e3"
fetch(url)
.then(res=>res.text())
.then(res=>JSON.parse(res.substr(4)))
.then(res=>res[1][0][5][0][5][1][2])
.then(res=>{
console.log(res);
return res;
})
.then(dm => {
var decoded, depthMap;
try {
decoded = self.decode(dm);
depthMap = self.parse(decoded);
} catch(e) {
console.error("Error loading depth map for pano " + panoId + "n" + e.message + "nAt " + e.filename + "(" + e.lineNumber + ")");
depthMap = self.createEmptyDepthMap();
}
if(self.onDepthLoad) {
self.depthMap = depthMap;
self.onDepthLoad();
}
})
.catch(e=>{
console.error("Request failed: " + url + "n" + e);
var depthMap = self.createEmptyDepthMap();
if(self.onDepthLoad) {
self.depthMap = depthMap;
self.onDepthLoad();
}
});