This site presents anybody with a tool for mapping his or her own tweets. This way, as well as knowing what you are up to your friends can learn about your whereabouts and have the information displayed as part of a rich map.
Such a service is implemented by including a hashtag that is followed by an address or a ZIP code, or any other landmark in actuality. Your tweet will there and then be displayed on the main page.
In addition to that, your tweet will be added to your TweetMapper profile page, and this can be used for embedding purposes. For instance, you can embed it on social sites or your blog, and let you peers know about your location at any given time.
Other than that, there is nothing else to mention except that you log in to the site using your Twitter credentials, and there is not a registration process per se to be complied with. So if you have a Twitter account, you are ready to start mapping your position at a flick of a wrist.
TweetMapper.com In Their Own Words
“Tweetmapper lets you map your tweets… Tell your friends where you are and where you have travelled, places to go and things to enjoy, even the news that’s happening around you – as it’s happening!”
Why TweetMapper.com It Might Be A Killer
It allows any person to keep his family and acquaintances fully abreast of his location.
Some Questions About TweetMapper.com
Shouldn’t a different log in process be implemented so that those who are a bit reluctant to give away their credentials will still be able to use this service? 
