FTW Global — Sentinel-2 Planting & Harvest Composites

Sentinel-2 planting- and harvest-season median composites at 10 m — the model-input features for the FTW Global field-boundary predictions. For each grid tile and season, ~5–10 quality-masked Sentinel-2 scenes (selected by latitude-based day-of-year heuristics) are reduced to a per-pixel median; bands are B02/B03/B04/B08 plus N_VALID_PIXELS, in the tile's native UTM zone. Part of Fields of the World. These composites feed the PRUE U-Net model (Muhawenayo et al. 2026; 76% IoU / 47% object-F1 on the Fields of the World benchmark of 70,462 Sentinel-2 samples across 24 countries, Kerner et al. 2025), whose outputs are the field-boundary predictions. The same composites are published in two equivalent formats: per-tile COGs (these per-year collections) and a single global EPSG:4326 Zarr mosaic (its own collection), stackable with the prediction Zarr.

Items & index: ~22.7k per-tile items (each with a planting and harvest COG asset) are indexed by the collection's STAC-GeoParquet asset (items.parquet); query that rather than enumerating item links.

Collections

• COGs — 2024 — per-tile planting + harvest COGs + a STAC-GeoParquet item index.
• COGs — 2025
• Zarr mosaic (2024 & 2025) — the same composites as one global datacube.

Folder layout

• cogs/ — the actual per-tile COG files (GeoTIFF) plus their index.parquet.
• zarr/alpha/global.zarr — the global Zarr mosaic data.
• 2024/, 2025/, zarr/ — the STAC metadata (a collection.json, README.md, item index). The 2024/ and 2025/ folders hold metadata only — the imagery itself lives under cogs/ (and zarr/).

Source imagery: Sentinel-2 L2A (ESA / Copernicus). License: CC-BY-4.0.