What location information is displayed?
All geolocation information begins as an exact location (latitude and longitude), which is sent from your browser or device. Twitter won’t show any location information unless you’ve opted-in to the feature, and have allowed your device or browser to transmit your coordinates to us. Based on that information, Tweets can be annotated with just that exact location, with a place (a town or neighborhood), or with both types of information. For each Tweet, we will publicly display whatever location information you’ve elected to share. For example, if you update from Twitter Mobile and have specified that a particular Tweet should show your exact location, these coordinates can be seen on Twitter.com, Twitter mobile, and in third-party applications. If you choose to only share your place, those Tweets will only be displayed with the general neighborhood information. Application developers are required to be up-front and obvious about whether your exact coordinates will be displayed, or just
