RETROCHANGE DATA LICENSE - UC1 / RETROCOVER
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Dataset:
RETROCHANGE UC1 RETROCOVER Hrebienok 1975 KH-9 Image Subset

Parent dataset:
RETROCHANGE High Tatras 1975 KH-9 Satellite Image Mosaic

License:
Creative Commons Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/


LICENSE SCOPE
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This license notice accompanies the UC1 / RETROCOVER Hrebienok image subset:
- uc1_1_3x3_hrebienok.tif
- uc1_1_3x3_hrebienok.tfw
- Associated dataset documentation in this data directory

The RETROCHANGE-derived georeferenced KH-9 imagery and associated
materials are made available under CC BY 4.0 to the extent of the
rights held by the Technical University in Zvolen.

This notice concerns the dataset. It does not assign a license to
the RETROCOVER application or its software dependencies.

Data provider and processing organization:
Technical University in Zvolen, Slovakia
RETROCHANGE project, 2026


SOURCE DATA AND THIRD-PARTY RIGHTS
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Declassified KH-9 (HEXAGON) satellite imagery courtesy of the
U.S. Geological Survey (USGS), Earth Resources Observation and
Science (EROS) Center.

The original U.S. Government imagery is public-domain data under
U.S. copyright law, unless otherwise specified by the source
provider.

The CC BY 4.0 license applies only to the rights held by the
Technical University in Zvolen in the RETROCHANGE-derived dataset.
It does not impose additional copyright restrictions on the
original public-domain imagery.


ATTRIBUTION
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When sharing or adapting material covered by CC BY 4.0, users
must provide appropriate credit, include a reference to the
license, and indicate whether changes have been made, in
accordance with the license terms.

Recommended dataset citation:

Technical University in Zvolen (2026).
RETROCHANGE UC1 RETROCOVER Hrebienok 1975 KH-9 Image Subset.
Subset of the RETROCHANGE High Tatras 1975 KH-9 Satellite Image
Mosaic, version 1.0. RETROCHANGE project.
https://gis.tuzvo.sk/retrochange

Recommended source acknowledgment:

Source imagery: Declassified KH-9 (HEXAGON) satellite imagery
courtesy of the U.S. Geological Survey (USGS), EROS Center.

Georeferencing, mosaicking, and data processing:
Technical University in Zvolen, RETROCHANGE project, 2026.

Acknowledgment of the original USGS imagery is requested as a
matter of good scientific practice.


DISCLAIMER
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The dataset is provided "as is", without warranty of positional,
radiometric, or thematic accuracy.

The dataset is not intended for cadastral, legal, engineering,
or survey-grade applications.

This statement describes the dataset's technical limitations
and does not impose additional restrictions on uses permitted
by CC BY 4.0.


PROJECT INFORMATION
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RETROCHANGE - Retrospective Analysis of Forest and Landscape
Changes from Historical Satellite Imagery

https://gis.tuzvo.sk/retrochange
