Topic Heatmaps

Select a topic to make a heatmap from tweets matching that topic.

Topics are inferred using Latent Dirichlet Allocation. We labelled a subset of the topics with names to allow easy searching.

Use the mouse to pan and zoom the map.

Max number to plot controls the number of tweets sampled for plotting. Larger values will provide more accurate heatmaps, but increase plotting time.

Only tweets that have an associated GPS location (about 10% of collected tweets, see the full paper for details) are plotted.