Methodology

How we know what we say we know.

Every indicator on CountryLens has its own methodology page — definition, primary source, license, refresh cadence, and the current world leaderboard. Click any indicator below to see how we render its value on country pages, and where the underlying data comes from.

Browse data interactively

Indicators: 41
Categories: 11
Primary sources: 18

Our sourcing rules

Primary only
UN agencies, national statistical offices, the World Bank, the IUCN Red List, UNEP-WCMC, and similar. No aggregators of aggregators.
License-clean
Every source ships under a permissive, commercial-compatible license (CC BY, CC BY-SA, CC0, public domain). CC-BY-NC sources are substituted, not silently ingested.
Deep-linked
Each fact links to the exact URL of the publisher's page with that value — not the publisher's homepage.
Auditable
Every fact carries the ID of the ingestion run that produced it. Stale data is replaced on a public cadence (annual for most, quarterly for the World Bank).

All indicators (41)

Click any indicator to see its definition, source, and current world leaderboard.

Biodiversity

3 indicators

Climate

1 indicator

Koeppen-Geiger climate classification (primary zones)codes (pipe-separated, e.g. 'Csa|Cfb')
Beck et al. 2018 (Koeppen-Geiger 1-km raster)

Connectivity

1 indicator

Individuals using the Internet (%)% of population
World Bank

Cost of living

8 indicators

Demographics

2 indicators

Economy

2 indicators

Environment

4 indicators

Governance

6 indicators

Health

9 indicators

Quality of life

2 indicators

Tax

3 indicators