# GLO - ESA Copernicus DEM 30m

> Copernicus DEM GLO-30: a global Digital Surface Model at 30 m resolution, distributed by the European Space Agency under the Copernicus Programme.

- **Collection ID:** `glo-esa-copdem-30m`
- **Resolution:** 30 m
- **Products:** Digital Surface Model (DSM)
- **Coverage:** Global
- **Time range:** 2011 – 2015
- **Items indexed:** 26,450
- **License:** [Copernicus DEM licensing terms](https://spacedata.copernicus.eu/collections/copernicus-digital-elevation-model)
- **STAC JSON:** https://api.darly.io/collections/glo-esa-copdem-30m

Copernicus DEM GLO-30: a global Digital Surface Model at 30 m resolution, distributed by the European Space Agency under the Copernicus Programme.

**Source & method:** A **Digital Surface Model (DSM)** — it represents the Earth's surface *including* buildings, infrastructure, and vegetation (not bare-earth terrain). Derived primarily from radar data acquired by the TanDEM-X mission (2011–2015) and edited to flatten water bodies, enforce coastlines, and remove outliers. This is a global reference elevation layer, not a lidar product.

**Resolution:** 30 m (1 arc-second) nominal. Tiles are 1°×1° in WGS84; rows are a fixed 3600, while the number of columns decreases toward the poles (latitude-dependent longitudinal sampling), so per-item shape and transform vary by latitude.

**Coordinate reference:** Geographic WGS84 (EPSG:4326); elevations in meters on the EGM2008 geoid (EPSG:3855).

**Hosting:** Assets reference the public, anonymously readable COGs in the `copernicus-dem-30m` AWS Open Data bucket **in place** — Darly does not re-host or copy the pixels.

**Coverage:** Global.

**Documentation:**
- [Copernicus DEM product page](https://spacedata.copernicus.eu/collections/copernicus-digital-elevation-model)
- [AWS Open Data registry entry](https://registry.opendata.aws/copernicus-dem/)

## Providers

- [European Space Agency (Copernicus Programme)](https://spacedata.copernicus.eu/collections/copernicus-digital-elevation-model) (licensor)
- [Airbus Defence and Space / DLR (TanDEM-X)](https://spacedata.copernicus.eu/collections/copernicus-digital-elevation-model) (producer)
- [AWS Open Data](https://registry.opendata.aws/copernicus-dem/) (host)
- [Darly](https://darly.io) (processor)

## Citation

European Space Agency, Sinergise (2021). Copernicus Global Digital Elevation Model (GLO-30). Distributed by OpenTopography / AWS Open Data.

## Access

```bash
curl "https://api.darly.io/collections/glo-esa-copdem-30m/items?limit=5"
```

Browse it in the [Data Explorer](https://darly.io/explorer) or read the [STAC API docs](https://darly.io/docs/stac).