I can put out a call on the "CrisisMapper" and other lists I'm on if Twitter needs help getting such databases - I just got into this game in mid-January and don't know what all is available.
M. Edward (Ed) Borasky

"A mathematician is a device for turning coffee into theorems." ~ Paul Erd?s

Quoting Raffi Krikorian <ra...@twitter.com>:

unclear, but we'll definitely message out to the list as we make more of our
datasets available.

On Mon, Mar 1, 2010 at 10:15 PM, M. Edward (Ed) Borasky

Awesome! That is a big step forward! How soon do you think this will be
rolled out to a couple of obvious places - Haiti and Chile? I've got a lot
of friends in the disaster response and the mapping communities that are
working hard to map places via mobiles, and there are as a result huge and
free as in freedom databases you can access.
M. Edward (Ed) Borasky

"A mathematician is a device for turning coffee into theorems." ~ Paul

Quoting Raffi Krikorian <ra...@twitter.com>:

 hi all.

i wanted to give you all a heads up on some big changes we're making to
geo-tagging API.  right now, you can post a status update along with a
latitude and longitude pair -- what we've jokingly referred to as
"geo-tweeting", is actually just a status update with a "where" in the
of a coordinate attached to it.  we're about to add a whole new layer of
context to that status update.

our goal is to provide a few more options to API developers (and the users
they are servicing) through this contextual information.  people, we find,
inherently want to talk about a "place".  a place, for a lot of people,
a name and is not a latitude and longitude pair.  (37.78215, -122.40060),
for example, doesn't mean a lot to a lot of people -- but, "San Francisco,
CA, USA" does.  we're also trying to help users who aren't comfortable
annotating their tweets with their exact coordinates, but, instead, are
really happy to say what city, or even neighborhood, they are in.
 annotating your place with a name does that too.

once our new additions to our geo infrastructure comes into place,
geo-tweets will get richer data.  for example, a status object may look
the following (abbreviated):

 "coordinates": {
   "coordinates": [-122.40060, 37.78215]
 "place": {
   "country":"United States",
   "full_name":"SoMa, San Francisco",
   "bounding_box": {
     "coordinates": [
         [ -122.42284884, 37.76893497 ],
         [ -122.3964, 37.76893497 ],
         [ -122.3964, 37.78752897 ],
         [ -122.42284884, 37.78752897 ]
 "text":"Wherever you go, there you are."

here you'll see a new place attribute that gives the contextual location
the geo-tweet itself.  in these cases, you'll have rich, and
information about where this tweet has come from -- in this case, SoMa,
Francisco.  the geo object, for the time being, is still there, so you
have to worry about backwards compatibility. it will soon be deprecated,
however and please plan for that.  we're also introducing a
coordinatesobject which has the added bonus that, when in JSON, it is

properly GeoJSON
encoded with the longitude before latitude.

to support this these changes we've added a few endpoints:


you can call geo/reverse_geocode with a latitude and longitude, and it
return an array of places that you can use to annotate your tweet with.
 each place that is returned will have a unique ID that you can use, as
as a displayable name, and even a geographical bounding box that you can
for display on a map.  if you want more details, then hit the
geo/idendpoint where, if available, and if you're interested, you can

retrieve a
more detailed geometry for more accurate map drawing.  we've also updated
the statuses/update documentation (

to indicate how to pass that place ID with your status update.

for this first pass, we're only going live with United States-centric
but that will quickly be expanded geographically as we work out the kinks
our system.  there are definitely some nuances that i'm missing in this
e-mail, a few things are still in flux, but we're rapidly documenting this
on our wiki, and we hope to be going live with it quite soon.  as always,
you have any questions, just find us at @twitterapi, or drop us an e-mail.

Raffi Krikorian
Twitter Platform Team

Raffi Krikorian
Twitter Platform Team

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