data api · United States

Smart Maps Global Elevation Tiles

WEBP elevation tiles, with mapbox pixel packing, packaged in PMTiles. Source data are NASADEM and Global Map data. Pleese see https://qiita.com/T-ubu/items/c7bb5697b51f245ef163 for technical details. Observable demo is https://observablehq.com/d/652ef8ca26776146.

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What's in it

Data offered docs-verified: global elevation tiles (RGB/WEBP, Mapbox pixel packing)
Coverage docs-verified: Global: ZL 2-5 around 85°N to 85°S; ZL 6-12 60°N to 56°S; 180°W to 180°E
Resolution docs-verified: about 30 m (1 arc second) for NASADEM-derived tiles at zoom 6-12
Formats docs-verified: PMTiles · WEBP
Access docs-verified: Public visibility, no API key stated; CC0 licence (No Rights Reserved); file URL https://data.source.coop/smartmaps/gel/gel.pmtiles

Useful for

Use cases llm-inferred: Terrain base layer for catchment and flood-risk maps where licensed DEMs are restricted · Preliminary slope and relief screening for drainage or civils options appraisal (not survey-grade) · Offline elevation basemap in GIS or web maps served from a single PMTiles file
Audience llm-inferred: GIS analysts · hydrologists · drainage engineers · civils engineers · planners

Limitations

Constraints llm-inferred: Single 182.5 GB PMTiles file with no regional split, so large downloads are needed for partial use · Zoom 6-12 coverage stops at 60°N and 56°S; zoom 2-5 extends only to about 85°N/85°S · Source DEM is about 30 m NASADEM and coarser Global Map data, so not suitable for survey-grade design levels · Global Map source project concluded in 2017; data converted in 2022 and last updated 21 Aug 2025, with no update schedule stated · ENTRY region is 'United States' but DOCS state global coverage; ENTRY licence says 'see product README' while DOCS state CC0

Licence: see product README
Authentication: Public; anonymous HTTPS/S3 access via data.source.coop
GitHub stars: Unknown
Last commit: Unknown
Last successful page check: 14/10/2026
Page health: page reachable
Package: Not recorded
Verification: Not independently verified

Provenance & evidence

Verified via Source Cooperative API /api/v1/products/smartmaps (public product, updated 2025-08-21).

Metadata observed 14/10/2026 · research sweep: manual-2026-10-15 (source.coop)