gee-acolite 1.0.1

ACOLITE atmospheric correction for Google Earth Engine

GEE ACOLITE

ACOLITE atmospheric correction implementation for Google Earth Engine (GEE).

Description

This package provides atmospheric correction for Sentinel-2 imagery using the ACOLITE dark spectrum fitting method, optimized for Google Earth Engine workflows. It includes:

• Dark Spectrum Fitting: Multiple methods (darkest, percentile, intercept)
• AOT Estimation: Fixed geometry mode
• Atmospheric Correction: Full LUT-based correction
• Water Quality Parameters: SPM, turbidity, chlorophyll, bathymetry indices
• Cloud Masking: Integration with Sentinel-2 Cloud Probability

Installation

From PyPI (when published)

pip install gee_acolite

From source

git clone https://github.com/Aouei/gee_acolite.git
cd gee_acolite
pip install -e .

Features

Atmospheric Correction Methods

• Fixed Geometry: Single AOT estimation for entire image
• Dark Spectrum Options:
  • darkest: Use minimum values
  • percentile: Use Nth percentile
  • intercept: Linear regression intercept

Model Selection Criteria

• min_drmsd: Minimum RMSD between observed and modeled reflectance
• min_dtau: Minimum delta AOT between darkest bands
• taua_cv: Minimum coefficient of variation

Water Quality Products

• SPM: Suspended particulate matter (Nechad 2016)
• Turbidity: Water turbidity (Nechad 2016)
• Chlorophyll: Chl-a concentration (OC2, OC3, Mishra)
• Bathymetry: Pseudo satellite-derived bathymetry (pSDB)
• Indices: NDWI, custom band ratios

Requirements

• Python ≥ 3.8
• earthengine-api ≥ 0.1.350
• numpy ≥ 1.20.0
• scipy ≥ 1.7.0
• ACOLITE (standalone installation required)

Installing ACOLITE

This package requires the ACOLITE atmospheric correction software to be installed separately:

# Clone ACOLITE repository
git clone https://github.com/acolite/acolite.git

# Install ACOLITE
cd acolite
pip install -e .

Important: ACOLITE is not available on PyPI and must be installed from source.

Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Add tests for new features
4. Submit a pull request

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.

Citation

If you use this package in your research, please cite:

@software{gee_acolite,
  author = {Sergio},
  title = {GEE ACOLITE: Atmospheric Correction for Google Earth Engine},
  year = {2025},
  url = {https://github.com/Aouei/gee_acolite}
}

And the original ACOLITE paper:

@article{vanhellemont2019,
  title={Adaptation of the dark spectrum fitting atmospheric correction for aquatic applications of the Landsat and Sentinel-2 archives},
  author={Vanhellemont, Quinten and Ruddick, Kevin},
  journal={Remote Sensing of Environment},
  volume={225},
  pages={175--192},
  year={2019},
  publisher={Elsevier}
}

Acknowledgments

This package is based on the ACOLITE software developed by RBINS (Royal Belgian Institute of Natural Sciences).

Contact

• GitHub: @Aouei
• Email: [e-mail]