We have been playing around with innovative ways of visualizing migration data and have developed an animated, interactive approach to viewing two-way movement.
Here the technique is used to give insight into internal migration in England and Wales. Each year approximately 1.7 million residents move between counties. This data is published as a very complex tabular form that is difficult to extract information from. In this map the data and a sense of the patterns of movement is provided in a really engaging format.
It’s featured on The Guardian Data Store