South Africa implements Geo taging for HIV treatment

A great example of the use of geo mapping techniques comes from South Africa where

Vodacom’s the Grid, South Africa’s first location-based mobile social network available to everyone who has a WAP-enabled cellphone, has mapped out close to 11 000 HIV-related support services covering prevention, treatment and support across South Africa.

According to the report from the country's media update

This initiative sees the Grid partnering with the HIV-911 programme – a comprehensive guide of HIV and AIDS related support services in South Africa. The main objective of the programme is to ensure that information about HIV support services are accessible to all South Africans. HIV-911 is funded by United States Agency for International Development / President’s Emergency Plan for AIDS Relief through the Foundation for Professional Development.

Location Location Twitter

Tweets are going to add location tags so that you will know exactly where a tweet is coming from.Good idea?

Well Martin Bryant doesn't think so.

He gives six reasons why it will have negative effects including the obvious one

Remember the man who tweeted that he was out of town and came back to discover his house had been burgled? In the near future that could be you even if you don’t mention you’re away from home. The geocriminals of the future will simply monitor tweeting location patterns. Most of your tweets will be likely to be sent from in, or close to, your home. When you’re tweeting from out of area they’ll swoop in and swipe your stuff.

Though before we all get too hung up about this potential,this will be an opt in rather than opt out feature but as Martin points out this

certainly devalue any analysis of Twitter location data. “200 tweets a minute are coming in from the disaster zone” is much more useful that what we’ll get – “We’re seeing 4 tweets a minute from the disaster zone; there might be more but they’re not sharing their location”.