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What's the Big Deal About City Data?

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Half the world already lives in cities and that rises to about three quarters by 2050, so urban systems get both scale and fragility. Open source stacks and data lakes and late-binding schemas make experimentation cheap, while projects with Energy Saving Trust use sensors on millions of buildings to measure real vs predicted energy performance. Civic data raises safety and ethics: traffic models can cause real harm, and pervasive monitoring risks a panopticon. Cities lack a single owner, so governance and payment models remain unresolved.

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