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And here it is, a heat map that shows... heat. The National Heat Map [gov.uk] (find the user guide here) shows the actual heat demand from buildings across England.

The data is based on models that drill down to an individual address level, yet did not acquire actual energy bills or smart metering. The map is meant for developers and planners to figure out which areas would be suitable for the development of local heat networks, or to support future climate change strategies. I guess it is also interesting in terms of studying the so-called urban island effect that describes how metropolitan areas tend to be significantly warmer than their surrounding rural areas.

Via Data Blog of The Guardian.

See also:
. Zoom into your Roof: Checking the Thermal Performance of Homes
. Revealing the Energy Consumption of Each Building in New York