Planetka Earth Surface - Data Sources and Attribution
=====================================================

Planetka's Earth Surface texture datasets are organized into subfolders:
- S2 (imagery)
- EL (elevation)
- WT (water/terrain mask)
- PO (population/built-up proxy)

The datasets are derived from third-party sources and include modifications and
optimizations by the Planetka author (e.g. declouding, retouching, artifact
removal, color grading, gap filling, format optimization).

1) S2 (Imagery): Copernicus Sentinel-2
-------------------------------------
Required acknowledgement (Copernicus Sentinel Data Legal Notice):
- "Copernicus Sentinel data [year]"
For modified data:
- "Contains modified Copernicus Sentinel data [year]"

Attribution Text (example):
- Contains modified Copernicus Sentinel data (2023).

See:
- Documentation/Licencing/Compliance/Copernicus Sentinel-2 Attribution.txt

2) EL/WT (Elevation / Mask): JAXA AW3D30 (ALOS World 3D - 30m)
-------------------------------------------------------------
Required acknowledgement (must mention JAXA + AW3D30):
- "AW3D30 (ALOS World 3D - 30m) provided by JAXA."

Commercial-purpose use:
JAXA’s terms include an advance-notification requirement for commercial-purpose
use. Planetka sent a commercial-purpose use notification email to JAXA on:
- 2026-03-05 12:10:04 CET

See:
- Documentation/Licencing/Compliance/JAXA AW3D30 Attribution and Terms.txt

3) PO (Built-up proxy): DLR World Settlement Footprint 2015 (WSF2015 v2)
------------------------------------------------------------------------
WSF2015 v2 is licenced under CC BY 4.0 (commercial use allowed with attribution,
licence link, and change notice).

Attribution Text (example):
- Contains modified data from World Settlement Footprint 2015 (WSF2015 v2),
  DLR (German Aerospace Center), licenced under CC BY 4.0.
  DOI: 10.15489/6n5h1ezef920

See:
- Documentation/Licencing/Compliance/DLR World Settlement Footprint 2015 Attribution (CC BY 4.0).txt

End-user renders (images/animations)
-----------------------------------
See:
- Documentation/Licencing/Attribution for User Renders.txt
