I've hosted my website in Firebase. I'm using firebase onRequest functions to track user Lat & Lag.
Below is the code,
User Geo Location Coordinates (Lat,Lag): ${req.headers['x-appengine-citylatlong']}
I accessed the website from my location, but firebase function gives me different Lat/Lag.
I'm getting correct Lat/Lag from this website https://www.gps-coordinates.net/
Currently I'm getting this Lat/Lag listed in this website https://ipinfo.io/
How do I get exact user coordinates ? please help.
Note: I can't use client side to get Lat/Lag. I have to do this in server side
Google App Engine-specific headers may not be enough for your expectations. You cannot get exact location using headers only. According to App Engine-specific headers:
X-Appengine-CityLatLong
Latitude and longitude of the city from which the request originated. This string might look like "37.386051,-122.083851" for a request from Mountain View.
Getting a precise address from the server without data and consent from the client side is impossible. That would be a huge privacy issue. I'm not sure if you're using web or mobile, but location permissions will always apply regardless of the platform.
This is also mentioned from this thread:
The specification explicitly states that since the nature of the API (Geolocation) also exposes the user’s location and therefore could compromise their privacy, the user’s permission to attempt to obtain the geolocation information must be sought before proceeding
While Maps SDK has wrapper libraries so you can run them on a server, Geolocation API is not mentioned, so what you want is really not possible.
Related
I have tried a number of times to implement HERE Maps for our application. We have both web and desktop clients and so we can't lock it down to a specific domain. I'm using the map tiles REST API, and all works except that I get CORS errors at random. At most zoom levels it is about 10% of the tiles that fail to download, but at deeper zoom levels (14+), almost all tiles fail.
Why would some tiles load but other tiles fail with the same requests? We have a Mapbox version that works flawlessly, and both use the Mercator projection and similar approach to tile specification.
UPDATE
Below you can see that most tiles downloaded OK but one did not:
Following shows one of the successful requests:
Next is a failed request:
Sometimes the same tile will load and other times not. This is at zoom level 10, and at 14+ things get much worse.
UPDATE 2
If I copy and paste two URIs into the browser address bar, one returns a tile and the other an error. Both are identical except for the x and y tile numbers. App ID and code are the same and in the correct order. Examples are (with app id and code masked):
https://4.base.maps.api.here.com/maptile/2.1/maptile/newest/normal.day/16/12107/21196/256/png8?app_id=myID&app_code=mycode
https://4.base.maps.api.here.com/maptile/2.1/maptile/newest/normal.day/16/12104/21195/256/png8?app_id=myID&app_code=mycode
The error on the second one is:
{"error":"Unauthorized","error_description":"This is not a valid app_id and app_code pair. Please verify that the values are not swapped between the app_id and app_code and the values provisioned by HERE (either by your customer representative or via http://developer.here.com/myapps) were copied correctly into the request."}
It makes no sense why I would be getting seemingly random authorization errors.
Any help would be appreciated.
The error you see is not due to CORS error. The 401 unauthorized response code, is either because you are using the wrong credentials or going over the quota for your credentials. In your case, it looks like you are over your quota(number of requests made).For any billing support questions, please email us at selfservesupport#here.com.
I have a published layer in Google Maps Engine that I am attempting to display using the Google Maps V3 API. In GME, the layer's "Shared with" access list includes my user and the "API access" access list also includes by user.
I am making the Maps V3 API call using MapsEngineLayer from the visualization library, and setting the appropriate auth token and layer asset id as part of the layerOptions.
The API call is failing with the error message:
Google Maps API V3 error: 403 (Forbidden access for too many pageviews)
The URL looks like:
https://earthbuilder.googleapis.com/my_gme_layer_asset_id-4/maproot/json?
output=jsonp&access_token=my_auth_token&callback=xdc._tsel5i
I have found some discussion threads related to "403" and "forbidden", but am having difficulty figuring out the meaning of (and solution to) the "too many pageviews" issue.
Any suggestions would be appreciated.
If you tried with #David solution and it doesnt work. It worths to check that you are not caching (or storing locally) the google maps js script. Google don't allow that. If you serve that file it will work for about 3 days and then stop working.
How many requests have you made so far today, there are usage limits on the Maps API that may be preventing you from requesting any further data.
https://developers.google.com/maps/faq#usagelimits
Although it does seem unlikely that you have hit their hard set 25,000 requests, you may want to make sure that you aren't accidentally DOSing them with http requests. That sort of thing will invariably burn through your limit, and potentially place your IP on a blacklist.
Also, you should check the Maps API Reference materials, i think you may be trying to use a deprecated API.
https://developers.google.com/maps/documentation/webservices
Your http request should look more like this:
http://maps.googleapis.com/maps/api/service/output?parameters
Where output is either json or xml.
edit: The Maps API Help page is located here.
I was trying to use Google Distance Matrix API JSON in my project, after formatting the url, for example:
http://maps.googleapis.com/maps/api/distancematrix/json?origins=Vancouver+BC|Seattle&destinations=San+Francisco|Victoria+BC&mode=bicycling&language=en&sensor=false
I was able to view the result in browser, but when I tried to make a http request to get the result, I will receive status : REQUEST_DENIED
In documentation:
REQUEST_DENIED indicates that the service denied use of the Distance
Matrix service by your application.
But I still don't know why my request is denied. More Info from google:
Use of the Distance Matrix API must relate to the display of
information on a Google Map; for example, to determine
origin-destination pairs that fall within a specific driving time from
one another, before requesting and displaying those destinations on a
map. Use of the service in an application that doesn't display a
Google map is prohibited.
If I can't get the result, how can I apply it on google map?
Anyone with same problem? I will post sample code later, to clarify my question more clearly.
I had a similar problem, but it was due to assuming that the sensor tag would default to false, but it is in fact required.
Google Distance Matrix API has a limit of elements set to 2500.
I highly doubt it that you would have gone over this limit, as you would have to have calculated the maximum 10 x 10 matrix 25 times over.
I am from South Africa, and it refused to work for any local addresses until I changed the transport mode to driving (from walking, I mean seriously, we have cars). Maybe that'll help
https://maps.googleapis.com/maps/api/distancematrix/json?origins=Seattle&destinations=San+Francisco&key=YOUR_API_KEY
Please make sure that you have created a credentials on Google Console which can be called as "API KEY" and you are using this API KEY in above request URL on the place of "YOUR_API_KEY"
I had the same problem earlier.
you need to check out with the Google Api key version and codes/scripts of version you are using.
I believe you need to get a Google Maps API key
You need to set an API KEY for using Google map services like this:
https://maps.googleapis.com/maps/api/distancematrix/json?units=imperial&origins=Washington,DC&destinations=New+York+City,NY&key=**YOUR_API_KEY**
First thing is that you need is to have an API key assigned to your application. This is done by creating it in the Google API Manager.
I hope your have enabled distance matrix API from google console for your application.
please refer
https://support.google.com/googleapi/answer/6158841?hl=en
along with this you can restrict API_KEY for unauthorized use.
I'm using the web application at http://m.rummble.com website and when I click find my location using gears. The application returns my current location (approximate city location) with various establishments in a given mile radius. To further understand how this works, I opened up wireshark and what I notice is that a POST request is sent to www.google.com/loc/json. Then the google server responds with 200 OK and location data in JSON format. I understand this part. The next step is what I don't understand. Apparently after the rummble application receives the location data (lat, long, address, etc.) it sends this information using a GET request to some api on another server that acquires the various establishments in a given mile radius. All I did was click, find my location using gears. I would reasonably expect the application to just return my location but it's returning more than that without clicking any other buttons in the application. Can someone explain how this happens? Is there a script that makes this happen? I hope I explained my situation better.
alt text http://img211.imageshack.us/img211/1236/examplel.jpg
Well, the first step in determining an anonymous user's location, is by his IP. If that's what you want, you need to do one of two things:
Find a database of IP-and-locations. A quick Google search turned up http://ip-to-country.webhosting.info/downloads/ip-to-country.csv.zip
Trace route and reverse-lookup the IPs to host names using DNS, and try to read the host names for geo-information, such as country and city.
Either way, once you have a country and/or city, you can do a lookup geo-lookup to find latitude and longitude, and display a map based on those coordinates.
Presumably, Google Gears uses something similar, or perhaps based on data mass-collected by Google using their various data-collection techniques. That way, once Google Gears has figured out where the user is, it knows which city/country he's in, and requests the matching latitude and longitude.
For whatever reason, rummble.com isn't querying navigator.getlocation on my machine, so I can't confirm your report myself.
However, when you click to allow rummble.com to get your location from Gears, you're handing over that location information to the rummble.com website. That website is then free to do with it as it wants -- the information is returned to a piece of Javascript running on the browser, and in this case it sounds like that piece of Javascript is using your location information to load a list of nearby restaurants.
You might very reasonably be worried about this. What if rummble were sending your name and location information to an advertiser or to the government? How long are they storing your precise location information? You should consider these implications before giving permission to share your location with a website.
I am working on a project which requires a server side access to google map api. i want to calculate distance (actual distance, not straight line). google map api supports javascript and not asp.net. please give suggestions ...!
you specified google maps in your question - but have you looked at Virtual Earth? Specifically this routing with Virtual Earth Web Service example sounds exactly like what you want:
server-side access (just Add Service Reference inside visual studio)
actual distance (not straight line) since it is using a route
The concerns raised by others about T&Cs for 'internal/intranet use' apply to VE as well as Google I think - you'll have to read up about whether your application needs licensing or not.
p.s. if you did just want to calculate straight-line distance, I have instructions using SQL Server 2008; which also links to some straight c# code that does it too.
The Google API allows you to Geocode via a server side call:
http://code.google.com/apis/maps/documentation/services.html#Geocoding_Direct
This would allow you to get the longitude and latitude of the locations. You can then cache these and use them to calculate distance using the techniques CMS suggests.
You will need to be careful of the Google T&C's though as you are only allowed to store the geocoding data for use on a Google map which is publicly available.
You would probably also run into limitations on the number of requests you could make from a single IP.
However I think what you mean by non-straight line distance is distance taking into account roads and one way streets etc.
If this is the case I think a commercial service is your only option. Although theoretically you could do it all via screen scraping, I'm almost certain that this would break Google's T&C's.
The simplest solution would probably be just to embed a Google map on a page of your application and let the user calculate the distance. You could pre-fill the to and from fields if required.
Again if this is for an internal app i.e. Not publicly available "my understanding" of the Google T&C's would forbid this.
Use something like firebug or fiddler to look at the requests that are being sent to Google from javascript you should then beable to build the request using that information and an HTTPWebRequest in .net and retrieve the same information.
HTH
You can calculate the distance of two geographical coordinates (latitude, longitude) using the Great-circle distance algorithm.
Here you can find some other formulas for distance calculation.
Well, you've pretty much identified the key issue, the Gmaps API is a browser resident javascript API and there's not much getting around that. Most of the API is executed in the browser so there's not much network traffic to spy on.
As tsaunders mentions there is a geocoding API call that is restfully accessible, but it only does reverse/geocoding and if you have lat/lng's already you can use the calculations the rms suggested, but they are as tsaunders points out 'as the crow flies' distance.
If indeed you are looking for road taken distance, the API does do routing but you are back in the browser to get the start/end points from the user.
Perhaps you can be a little more specific about what you are trying to do and why you feel this requires you to to access the API from your server. My application for instance has features that gather information from the user and sends requests back to my server to work on, some of that data are processed by the Gmaps API first.
If I were to use a API platform, I certinaly would not use Google as the free one does not include advances Geocoding menaing the accuracy is poor. There is also no sla , support or rights of service.
The directions are poor, the coverage for Ireland and Geocoding is almost childlike and the privacy stinks. No professional business would use a google mapping solution.
They copy everyone else's idea, say they are there own and get loads of press (they only added tube stations in 2006) an dcyclc lanes (2010), viamichelin added these 2006 and Traffic in 2009 !
Any agency or developers looking for an API should stick to Bing or ViaMichelin for better customisation and user experience which is killer !