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Source Cooperative is a Radiant Earth project

rumi-api-fixtures · asterisk-labs · Source Cooperative | Source Cooperative

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Rumi API Fixtures

Name: rumi-api-fixtures
Creator: asterisk-labs

A small, deterministic collection of Earth-observation arrays encoded as Rumi files and hosted on Source Cooperative for reproducible examples and tests.

This repository tests the Rumi API and its stateless remote range reads through Karu. It is not a training dataset, a scientific benchmark, or a general-purpose imagery archive.

What this dataset tests

The fixtures cover:

complete and windowed reads;
band selection and ordering;
temporal selection;
batch reads with rumi.read_many;
tile, planar, and pixel-interleaved frame layouts;
signed and unsigned integer types;
single-band, multiband, and high-dimensional arrays;
geospatial and temporal metadata; and
public HTTP Range reads from Source Cooperative.

Repository structure

Each .rumi file has a corresponding external header. The manifest records its original EarthCompress sample, logical shape, data type, frame layout, tile size, metadata, and checksums.

Read directly from Source Cooperative

The .rumi container is not downloaded in full. Karu requests only the byte ranges needed for the selected frames.

Fixtures

Fixture	Source corpus	Purpose
`s2-00-tile`	Sentinel-2 L1C	Window and band-selective reads
`s2-01-tile`	Sentinel-2 L1C	Batch reads
`s2-02-tile`	Sentinel-2 L1C	Batch reads
`s2-00-planar`	Sentinel-2 L1C	Planar frame layout
`s2-00-chunky`	Sentinel-2 L1C	Pixel-interleaved frame layout
`era5-t2m-00-time`	ERA5	Temporal selections and ragged edges
`alphaearth-00`	AlphaEarth	Signed `int8` with 64 bands
`emit-00`	EMIT L2A	Signed `int16` with 285 bands
`s1-00`	Sentinel-1 GRD	Signed radar values

The three encodings of s2-00 contain the same logical array. They are repeated intentionally to verify that frame layout changes storage and range behavior without changing decoded results.

Public addresses

Browse: https://source.coop/asterisk-labs/rumi-api-fixtures
HTTP: https://data.source.coop/asterisk-labs/rumi-api-fixtures/
Rumi/Karu: source://asterisk-labs/rumi-api-fixtures/
Canonical build repository: https://huggingface.co/datasets/asterisk-labs/rumi-api-fixtures

Verification

After downloading the repository, validate every complete file and its decoded array checksum with:

The public Source mirror has also been validated with the selections and batch expectations stored in manifest.json.

Data provenance and licensing

The arrays are selected from the EarthCompress benchmark corpora. Their values are preserved; only their storage representation changes when encoded as Rumi files. manifest.json identifies the exact source corpus and sample for every fixture and preserves the original array checksum.

The underlying observations remain subject to the terms of their respective data providers. See SOURCE_DATA.md for attribution, licensing, and redistribution notes.

Scope

These fixtures are deliberately small and are not statistically representative of their source datasets. Passing these tests establishes API and format compatibility; it does not measure compression performance or scientific fitness.