Unfortunately in our recent site migration some of the details are temporarily missing, here’s what you need to know.
A comma-separated list of longitude,latitude pairs specifying a set of bounding boxes to filter Tweets by. Only geolocated Tweets falling within the requested bounding boxes will be included—unlike the Search API, the user’s location field is not used to filter Tweets.
Each bounding box should be specified as a pair of longitude and latitude pairs, with the southwest corner of the bounding box coming first.
-d "locations=-74,40,-73,41" would specify tracking Tweets in New York City.