Currently in beta, the meter is part of our wider 'Ask' tool which will allows anyone to 'mine' data from Twitter or carry out a survey of either the world, a continent, a nation, a city or a local area. In short, we think it has notable potential for social science and the analysis of trends and relationships in a variety of areas.
We have run various beta tests on data collection with the main mining process starting next week over a 24 hour period. We aim to collect all tweets with a geo-location tag in the above cities, this is a large amount of data allowing various social, spatial and temporal analysis to be carried out.
The system is under development here at CASA as part of a wider survey tool as part of the NeISS project being coded by Steven Gray in association with Urban Tick, currently carrying out analysis on the data sampled so far.
We are moving it into the 'real world' as well with a series of Tweet-o-Meters linked to panel meters sitting on our shelves here in CASA:
Take a look for yourself - The City Tweet-o-Meter