• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Location Publishing

    November 22nd, 2011
    gps, latitude, logging, tech
    Since I now have a phone with gps and internet, I thought I should write something to log my location, for potential future data analysis. It turns out this already exists, implemented by google latitude among others. I just had to tell google maps on my phone "join latitude" and enable historical logging in the settings, and I was all set. Pulling the gps data out again is a bit of a pain, and required jumping through several steps [1] of server side oauth2, similar to what I had to do to set up pulling in facebook comments, but now I have "Current GPS Location: Home" on my main page [2]. I think it's good practice not to rely on privacy, so it doesn't bother me that people can see where I am all the time.

    Update 2011-11-23: Two people have said a worry is that public location data makes you more vulnerable to theft. My thought is that there are already multiple ways to tell if someone is home: lights, car, watching the door, looking in the window, calling the house phone and seeing if anyone answers. None of these are that reliable, and neither is this one: there might be other people who live in the house as well.


    [1] If you're interested in technical details, I had to:

    1. once: get a client_id from the api console.
    2. once: request a server side code:
            firefox https://accounts.google.com/o/oauth2/auth
              ?scope=https://www.googleapis.com/auth/latitude.all.best
              &redirect_uri=[redirect uri set up in api console]
              &response_type=code
              &client_id=[client id from api console]
              &access_type=offline
            
    3. once: request a refresh token using the code:
            curl -d "code=[code from url previous step redirected to]
              &client_id=[same client id from api console]
              &client_secret=[client secret from api console]
              &redirect_uri=[same redirect uri set up in api console]
              &grant_type=authorization_code"
              https://accounts.google.com/o/oauth2/token
            
    4. every time: request an access token, using the refresh token:
            token_url = "https://accounts.google.com/o/oauth2/token"
            post_body = urllib.urlencode({
              "refresh_token": REFRESH_TOKEN,
              "client_id": CLIENT_ID,
              "client_secret": CLIENT_SECRET,
              "grant_type": "refresh_token"})
            r = urllib2.urlopen(urllib2.Request(token_url, post_body)).read()
            access_token = json.loads(r)["access_token"]
            
    5. every time: request the data from the api:
            url = 'https://www.googleapis.com/latitude/v1/currentLocation?granularity=best'
            headers = { "Authorization": "OAuth " + access_token }
            r = urllib2.urlopen(urllib2.Request(url, None, headers)).read()
            d = json.loads(r)["data"]
            lat, lng = d["latitude"], d["longitude"]
            

    This setup makes a lot of sense if you're making something automated that lots of people will need to go through. It doesn't make much sense if you're making something for use just by the developer; it's no more secure than just "sign up, get key, use key".

    [2] If you want to do something automated, I also made a raw feed

    Comment via: google plus, facebook

    Recent posts on blogs I like:

    Moral aesthetics

    “Doing good” differs by subculture The post Moral aesthetics appeared first on Otherwise.

    via Otherwise September 29, 2022

    Futurist prediction methods and accuracy

    I've been reading a lot of predictions from people who are looking to understand what problems humanity will face 10-50 years out (and sometimes longer) in order to work in areas that will be instrumental for the future and wondering how accurate thes…

    via Posts on September 12, 2022

    On the Beach

    I really like going in the water and this beach is a great place for building sand castles and boogie boarding. I also like trying to float on top of big waves. I'm not very good at it. I only float on the flat waves.

    via Anna Wise's Blog Posts July 12, 2022

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact