This is a sample payload for Gnip's premium feeds from Twitter in JSON Activity Streams format.

Twitter Premium Sample Payload with Geo Info - JSON Activity Streams format.js

{
  "verb": "post",
  "location": {
    "country_code": "United States",
    "displayName": "Downtown, Boulder",
    "objectType": "place",
    "geo": {
      "coordinates": [
        [
          [
            -105.295899,
            40.013625
          ],
          [
            -105.271683,
            40.013625
          ],
          [
            -105.271683,
            40.020434
          ],
          [
            -105.295899,
            40.020434
          ]
        ]
      ],
      "type": "Polygon"
    },
    "streetAddress": null,
    "link": "http://api.twitter.com/1/geo/id/9be2ad0f7f091494.json"
  },
  "postedTime": "2011-01-03T17:48:08+00:00",
  "body": "For some reason I find it pretty easy to remember to write '2011' rather than '2010' this year.",
  "actor": {
    "location": {
      "displayName": "Boulder, CO",
      "objectType": "place"
    },
    "postedTime": "2008-03-28T22:14:17+00:00",
    "displayName": "Nick howard",
    "preferredUsername": "baroquebobcat",
    "utcOffset": -25200,
    "objectType": "person",
    "statusesCount": 2354,
    "languages": [
      "en"
    ],
    "listedCount": 18,
    "links": [
      {
        "href": "http://blog.baroquebobcat.com",
        "rel": "me"
      }
    ],
    "friendsCount": 329,
    "followersCount": 219,
    "summary": "Am interested in CS:AI, Web, identity Also I like to fence, sing and play video games ",
    "link": "http://twitter.com/baroquebobcat",
    "image": "http://a1.twimg.com/profile_images/1154659940/tw_profile_normal.jpg"
  },
  "objectType": "activity",
  "id": "tag:search.twitter.com,2005:21986181948379136",
  "geo": {
    "coordinates": [
      40.0191219,
      -105.2746654
    ],
    "type": "Point"
  },
  "link": "http://twitter.com/baroquebobcat/statuses/21986181948379136",
  "generator": {
    "displayName": "geo tweeter",
    "link": "http://geo-tweeter.heroku.com/"
  },
  "object": {
    "postedTime": "2011-01-03T17:48:08+00:00",
    "id": "tag:search.twitter.com,2005:21986181948379136",
    "objectType": "note",
    "link": "http://twitter.com/baroquebobcat/statuses/21986181948379136",
    "summary": "For some reason I find it pretty easy to remember to write '2011' rather than '2010' this year."
  },
  "provider": {
    "displayName": "Twitter",
    "objectType": "service",
    "link": "http://www.twitter.com"
  }
}