License & Attribution

This page documents the data sources, technologies, and licenses used in producing the satellite imagery analyses and visualizations on this site.

Satellite Data

All satellite imagery is derived from Sentinel-2 missions operated by the European Space Agency (ESA) under the Copernicus Programme.

Attribution: Contains modified Copernicus Sentinel data 2024-2025

License: Copernicus Sentinel data is provided under free and open access terms, permitting reproduction, distribution, communication, adaptation, modification, and commercial use with attribution. Full terms: Copernicus Sentinel Data Legal Notice

Technology Stack

Our analysis pipeline is built entirely with open-source technologies.

Geospatial & Scientific Computing

GDAL - Geospatial data abstraction library (gdal.org) - MIT/X11
Rasterio - Raster data I/O (rasterio.readthedocs.io) - BSD-3-Clause
NumPy - Array computing (numpy.org) - BSD-3-Clause
Pandas - Data analysis (pandas.pydata.org) - BSD-3-Clause

Machine Learning & Cloud Detection

PyTorch - Deep learning framework (pytorch.org) - BSD-3-Clause
OmniCloudMask - Cloud and shadow detection (github.com/DPIRD-DMA/OmniCloudMask) - MIT
Paper: https://doi.org/10.1016/j.rse.2025.114694

Data Infrastructure

PostgreSQL - Database management (postgresql.org) - PostgreSQL License (BSD/MIT-style)
PostGIS - Spatial database extension (postgis.net) - GPL-2.0
psycopg2 - PostgreSQL adapter (psycopg.org) - LGPL-3.0+
boto3 - Cloud storage SDK (boto3.amazonaws.com) - Apache-2.0

Site Infrastructure

Hugo - Static site generator (gohugo.io) - Apache-2.0
Nginx - Web server (nginx.org) - BSD-2-Clause
Docker - Containerization platform (docker.com) - Apache-2.0
Terminal Theme - By Radek Kozieł (@panr) (github.com/panr/hugo-theme-terminal) - MIT

Original Content

Original analysis, commentary, visualizations, and derivative works authored by Sentinel Bird LLC are made available under:

Creative Commons Attribution 4.0 International (CC BY 4.0)

Learn more about your rights.