Landsat to Sentinel-2 WorldWide, Multi-Year (LS2S2WWMY)

This dataset comprises joint Sentinel-2 and Landsat-8 and Landsat-9 Satellite Image Time Series (SITS) with a length of 1 year, and a random start between 2022.01 and 2025.06. It is composed of 138 Areas Of Interest (AOIs) for the training set and 69 AOIs for the testing set, each covering an area of 9.9x9.9 km² (990x990 pixels for Sentinel-2 and 330x330 pixels for Landsat) covering the whole World. All dates with more than 25% of clear pixels over the AOI are included in the dataset. This yields a total of 6 477 Sentinel-2 images and 4 403 Landsat-8 and 9 images in the training set.

The dataset extends the LS2S2 dataset ( https://zenodo.org/records/15471890 ), by providing more diverse AOIs in terms of geographical and temporal coverage.

For each sensor, Top-of-Canopy surface reflectance from level 2 products are used. The spectral bands included in the dataset are presented in the following table. It can be observed that the Landsat sensor does not have Red Edge bands or wide Infra-Red, and conversely Sentinel-2 sensor does not retrieve Land Surface Temperature (LST).

In addition to the spectral bands, corresponding quality masks have been used to derive a validity mask for each date of each sensor. This dataset has been gathered through the OpenEO API, in the frame of following work:

Julien Michel, Jordi Inglada. Temporal Attention Multi-Resolution Fusion of Satellite Image Time-Series, applied to Landsat-8/9 and Sentinel-2: all bands, any time, at best spatial resolution. 2025. https://hal.science/hal-05101526v2

The source code associated with the paper, including the download script that created the dataset, is available here: https://github.com/Evoland-Land-Monitoring-Evolution/tamrfsits

The dataset comprises one zip file per AOI. The naming pattern for the zip file is as follows {test/train}_{mgrs_tile}_{subtile}.zip. The {test/train} field indicates if the file is part of the training or testing set. The {mgrs_tile} field correspond to the MGRS tile from which the AOI has been sampled. The {subtile} field indicate which su-btile of the MGRS tile has been sampled. Sub-tiles correspond to 1024x1204 internal JPEG2000 tiles of the Sentinel-2 product. Their numbering follows the lexicographical order (columns then rows).

For a more detailed description of the file formats and organization, please refer to the LS2S2 dataset ( https://zenodo.org/records/15471890 ).

Contains modified Copernicus Sentinel data [2022]. Copernicus Sentinel data are free and open access data regulated by the Sentinel_Data_Legal_Notice.pdf that can be found in the dataset repository.

Contains modified Landsat data from Collection 2 archive [2022]. Landsat data are in public domain.
Crawford, C.J., Roy, D.P., Arab, S., Barnes, C., Vermote, E., Hulley, G., Gerace, A., Choate, M., Engebretson, C., et al. 2023. “The 50-Year Landsat Collection 2 Archive.” Science of Remote Sensing (2023)  https://doi.org/10.1016/j.srs.2023.100103.

In respect of the above, the LS2S2WWMY dataset is licensed under the following:

Creative Commons Attribution 4.0 International
The Creative Commons Attribution license allows re-distribution and re-use of a licensed work on the condition that the creator is appropriately credited.

This work was partly performed using HPC resources from GENCI-IDRIS (Grant 2023-AD010114835)

This work was partly performed using HPC resources from CNES Computing Center.

The authors acknowledge funding from the EvoLand project (Evolution of the Copernicus Land Service portfolio, grant agreement No 101082130) funded from the European Union's Horizon Europe research and innovation program.