---
license: cc-by-sa-4.0
tags:
- climate
- earth observation
- pre-training
pretty_name: THOR-Pretrain
size_categories:
- 10K<n<100K
task_categories:
- image-feature-extraction
configs:
- config_name: default
  data_files:
  - split: train
    path: satellite/metadata.parquet
---

# THOR-Pretrain

Code to load data and details to come soon...


## Release Notes

- `global_availability_index.parquet` -> `satellite/metadata.parquet`

## Layout

- `satellite/metadata.parquet`: satellite sample metadata.
- `satellite/shards/`: WebDataset tar shards.
- `satellite/tar_index/`: byte-offset sidecar JSON for each satellite tar.
- `era5_land/metadata.parquet`: ERA5-Land daily metadata.
- `era5_land/shards/`: ERA5-Land daily WebDataset tar shards.
- `era5_land/tar_index/`: byte-offset sidecar JSON for each ERA5-Land tar.

## ERA5-Land

ERA5-Land samples are date-only files with global coverage. This release covers
all daily input files from 2016-01-01 through 2023-12-31: 2,921 dates.

## Sidecar Byte Ranges

Each tar shard has a matching JSON sidecar under `tar_index/`. Sidecars contain
tar member byte offsets and sizes so readers can fetch individual samples without
downloading whole tar files.


### Attribution

THOR-Pretrain is part of the FM4CS project funded by the European Space Agency Φ-Lab (contract #4000143489/24/I-DT).

Contains modified Copernicus Sentinel data (2016-2024).

© ESA WorldCover project 2020 / Contains modified Copernicus Sentinel data (2020) processed by the ESA WorldCover consortium.

© ESA 2010 and Université catholique de Louvain (UCLouvain) - GlobCover.

We acknowledge the use of data products from NASA's Land Processes Distributed Active Archive Center (LP DAAC), USGS/EROS (DOI: 10.5067/MODIS/MCD12Q1.061).

DEM data from European Union's Copernicus Land Monitoring Service information (EU-DEM v1.0).

DEM data include products produced using Copernicus WorldDEM-30 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved.