---
title: "Access global topographic datasets including SRTM GL3 (Global 90m), GL1 (Global 30m), ALOS World 3D, SRTM15+ V2.1, GEBCO IceTopo, and GEBCO SubIceTopo (Global Bathymetry 500m). Note: Requests are limited to 500,000,000 km² for GEDI L3, 125,000,000 km² for SRTM15+ V2.1, GEBCO IceTopo, and GEBCO SubIceTopo, 4,050,000 km² for SRTM GL3, COP90 and 450,000 km² for all other data."
method: GET
path: "/globaldem"
tags: ["Public"]
---

# Access global topographic datasets including SRTM GL3 (Global 90m), GL1 (Global 30m), ALOS World 3D, SRTM15+ V2.1, GEBCO IceTopo, and GEBCO SubIceTopo (Global Bathymetry 500m). Note: Requests are limited to 500,000,000 km² for GEDI L3, 125,000,000 km² for SRTM15+ V2.1, GEBCO IceTopo, and GEBCO SubIceTopo, 4,050,000 km² for SRTM GL3, COP90 and 450,000 km² for all other data.

`GET /globaldem`

## Request

- Base URL: `https://portal.opentopography.org/API`
- URL: `https://portal.opentopography.org/API/globaldem`
- Auth: none declared
- TypeScript: <https://skmtc.dev/opentopography/apis/opentopography-api/docs/globaldem/get.ts> (a function with typed inputs; its response is checked against the schema)

## Query parameters

- `demtype` 'SRTMGL3' | 'SRTMGL1' | 'SRTMGL1_E' | 'AW3D30' | 'AW3D30_E' | 'SRTM15Plus' | 'NASADEM' | 'COP30' | 'COP90' | 'EU_DTM' | 'GEDI_L3' | 'GEBCOIceTopo' | 'GEBCOSubIceTopo' | 'CA_MRDEM_DTM' | 'CA_MRDEM_DSM' | 'ANADEM' | 'GEDTM30', required
- `south` number, required
- `north` number, required
- `west` number, required
- `east` number, required
- `outputFormat` 'GTiff' | 'AAIGrid' | 'HFA'
- `API_Key` string, required

## Response `200`

OK

## Other responses

- `204`: No Data
- `400`: Bad request
- `401`: Unauthorized
- `500`: Internal error

---

[API](https://skmtc.dev/opentopography/apis/opentopography-api.md) - [All operations](https://skmtc.dev/opentopography/apis/opentopography-api/llms.txt) - [OpenAPI document](https://skmtc.dev/opentopography/apis/opentopography-api/revisions/32d54a7631c9?raw)