Datasetpublic

aliasfox/srtm30m

SRTM 30m Global Digital Elevation Model NASA Shuttle Radar Topography Mission (SRTM) 30m resolution global DEM, converted to Cloud Optimized GeoTIFF format. Dataset Details Source: NASA SRTM GL1 v3 (Global 1 arc-second, ~30m resolution) Coverage: 80% of land surface between 56°S and 60°N Resolution: ~30 meters (1 arc-second) Format: GeoTIFF with Deflate compression, 16-bit signed integer Files: 14,296 tiles, ~65 GB total Tile naming: N{lat}E{lon}.tif or… See the full description on the dataset page: https://huggingface.co/datasets/aliasfox/srtm30m.

sourceHugging Faceotherupdated 2mo agoView on Hugging Face

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Dataset Card

SRTM 30m Global Digital Elevation Model

NASA Shuttle Radar Topography Mission (SRTM) 30m resolution global DEM, converted to Cloud Optimized GeoTIFF format.

Dataset Details

—Source: NASA SRTM GL1 v3 (Global 1 arc-second, ~30m resolution)
—Coverage: 80% of land surface between 56°S and 60°N
—Resolution: ~30 meters (1 arc-second)
—Format: GeoTIFF with Deflate compression, 16-bit signed integer
—Files: 14,296 tiles, ~65 GB total
—Tile naming: N{lat}E{lon}.tif or S{lat}W{lon}.tif (1°×1° tiles)
—Internal tiling: 256×256 pixels, 15×15 grid per file (225 internal tiles)
—NoData value: -32768
—Horizontal datum: WGS 84

Usage

Via OpenZenith API

GET https://openzenith.pages.dev/api/elevation?lat=28.5&lon=96.5

Direct download

python

from huggingface_hub import hf_hub_download
path = hf_hub_download("aliasfox/srtm30m", "N28E096.tif", repo_type="dataset")

HTTP Range requests

Each GeoTIFF file supports HTTP Range requests. The first ~4KB contains the IFD (Image File Directory) with tile offsets. Each 256×256 internal tile can be fetched individually (~3-53 KB compressed).

File Structure

Each file covers a 1°×1° area:

—Image size: 3601×3601 pixels
—Pixel values: elevation in meters (Int16)
—Compression: Deflate (zlib)
—Internal tiles: 256×256 (225 tiles per file)