# Data licenses

The website code is **MIT-licensed** (see `LICENSE`). The *data* served
under `public/data/v1/` is derived from third-party open sources and is
redistributed under the terms of those sources. When you reuse data downloaded
from this site you must carry these attributions forward.

| Source | License | Required attribution |
|---|---|---|
| UNHCR Refugee Population Statistics Database (`api.unhcr.org/population/v1`) | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) | "UNHCR Refugee Population Statistics Database" |
| IDMC Global Internal Displacement Database / IDU (via UNHCR `/idmc/` and Helix API) | CC BY-IGO | "Internal Displacement Monitoring Centre (IDMC)" |
| UN World Population Prospects 2024 | [CC BY 3.0 IGO](https://creativecommons.org/licenses/by/3.0/igo/) | "United Nations, Department of Economic and Social Affairs, Population Division (2024). World Population Prospects 2024" |
| Natural Earth (via `world-atlas`) | Public domain | Crediting is not required; we credit anyway: "Made with Natural Earth" |
| OpenFreeMap / OpenStreetMap basemap tiles | ODbL (OSM data) | "© OpenFreeMap © OpenStreetMap contributors" |

## This site's own contributions

The transformations, file structure, derived aggregates (e.g. the computed
record library and `total_poc` sums), metadata and translations that this site
adds on top of the sources are released under
[CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), attribution
"Where They Went (wheretheywent.lakkev.com)". In practice: attribute the
upstream sources per the table above **and** this site when you reuse its
derived files — the ready-to-paste line on [/cite](/cite) covers both.

Every CSV/JSON download from this site embeds `source_id`, `source_attribution`,
`data_as_of` and `retrieved_at` columns so that provenance travels with the
numbers. Boundaries and names do not imply official endorsement — see
`/about/boundaries`.