The Global Human Settlement Layer (GHSL) is the most comprehensive free dataset for mapping where humans live and how human settlements have changed over the past five decades — produced by the European Commission's Joint Research Centre using satellite imagery and census data.
The dataset answers fundamental questions in urban and population geography: Where are buildings? How many people live there? How has that changed since 1975? At 10-meter resolution globally, GHSL provides answers at a scale and coverage that no other free dataset matches.
The multi-temporal design is what distinguishes GHSL from snapshot products. With consistent data for 1975, 1990, 2000, 2015, and 2020, analysts can track urban expansion around any city, measure the rate of rural-to-urban migration, or quantify infrastructure exposure growth in flood or earthquake zones. A city that appears stable in a current basemap may reveal decades of sprawl when examined through the GHSL time series.
The urbanization classification layer (GHSL-SMOD) implements the Degree of Urbanization standard adopted by the UN and Eurostat, providing consistent categories — urban centres, urban clusters, suburban areas, low-density rural, and very low density rural — that align with policy-relevant definitions of what counts as "urban." This makes GHSL data directly comparable across countries without the definitional inconsistencies that plague national urban statistics.
For disaster risk analysis, GHSL population grids provide sub-national exposure estimates that are more current and consistent than census data in many countries. Agencies including UNDRR, the World Bank, and national disaster management organizations use GHSL-derived exposure metrics in disaster risk assessments and the Sendai Framework monitoring process.
Data is distributed as GeoTIFF rasters through the JRC Data Catalogue and can be accessed via the GHSL download interface without registration.
