Getting the location of a tweet and regarding hot new things about twitter API

Guys!! How can I get the location of a tweet i.e. where it originated from? I'm a new web developer so I n开发者_JAVA百科eed some hot new topics which are cool to work upon in the twitter api. Suggest me some real good topics. Thanx in advance.

Every tweet delivered by the Twitter API has a geo_lat and geo_long value. Unfortunately, less than 0.5% of tweets have that filled in on average. Very few people have Twitter include their phone GPS data in a tweet.