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The Social Connectedness Index (SCI) measures the relative probability that two locations are connected by a Facebook friendship: if the SCI between A and B is twice the SCI between A and C, a Facebook user in A is about twice as likely to be friends with someone in B as with someone in C.
This tool builds publication-quality SCI maps. Pick a home region, choose the geography shown across the map, and the colors reveal how strongly every place is connected to your home region. The advanced options fine-tune the palette, legend breaks, borders, and framing — then download the result as a PNG, JPG, SVG, or MP4.
More details, including the full data download, are available at the Humanitarian Data Exchange.
Fill in the parameters and click Generate Map.