Methodology

Coverage & data tiers

What cities we cover and how data depth varies by topic.

Our coverage varies by data type — not every city has the same depth of information. We're transparent about where coverage is deep and where it's thinner.

Coverage tiers

  • 29,000+ cities across 190+ countries for environmental data — climate, air quality, green space. These come from global satellite datasets that cover every inhabited area on Earth.
  • 10,000+ cities for demographics and economy — cost of living, safety, infrastructure. Sourced from statistical offices and international organizations.
  • 500+ cities for lifestyle and culture — food scene, nightlife, coworking, walkability. Derived from geographic databases and AI-assisted analysis of open sources.

Why coverage varies

Satellite data covers the entire planet. Government statistics don't. Climate metrics from ERA5 are available for any coordinate on Earth. But cost-of-living data requires a statistical office that publishes it, and lifestyle metrics require dense enough geographic data to score meaningfully.

We're constantly expanding — both the number of cities and the depth of metrics per city.

How we handle gaps

  • Missing data is shown, not hidden. City pages indicate which metrics have data and which don't.
  • We never fabricate scores. If we don't have data for a metric in a city, that metric is absent — not estimated or averaged from nearby cities.

See it in action

Browse the explore map to see 29,000+ cities filterable by 90+ features, or check any city page for per-metric source citations.