{"id":167,"date":"2026-11-02T06:41:57","date_gmt":"2026-11-02T06:41:57","guid":{"rendered":"https:\/\/gis.tuzvo.sk\/retrochange\/?page_id=167"},"modified":"2026-11-06T18:24:18","modified_gmt":"2026-11-06T18:24:18","slug":"data-packages","status":"publish","type":"page","link":"https:\/\/gis.tuzvo.sk\/retrochange\/?page_id=167","title":{"rendered":"Data Packages"},"content":{"rendered":"\n<style id=\"retrochange-approved-hero-167\">\nbody.page-id-167 .wp-block-cover:has(.wp-block-post-title) { min-height: 300px !important; }\nbody.page-id-167 .wp-block-cover:has(.wp-block-post-title) .wp-block-spacer { height: 30px !important; }\n@media (max-width: 600px) {\n body.page-id-167 .wp-block-cover:has(.wp-block-post-title) { min-height: 240px !important; }\n body.page-id-167 .wp-block-cover:has(.wp-block-post-title) .wp-block-columns { display: block; }\n body.page-id-167 .wp-block-cover .wp-block-post-title { font-size: 32px; overflow-wrap: normal; word-break: normal; }\n}\n<\/style>\n\n\n\n<style id=\"retrochange-outputs-eyebrow-167\">\nbody.page-id-167 .wp-block-post-title::before {\n content: \"Outputs\";\n display: block;\n color: var(--wp--preset--color--primary, #eb710f);\n font-size: 16px;\n font-weight: 500;\n font-style: normal;\n line-height: 1.45;\n letter-spacing: normal;\n text-transform: none;\n padding: 9px 18px;\n margin: 0 0 16px;\n}\n@media (max-width: 600px) {\n body.page-id-167 .wp-block-cover:has(.wp-block-post-title) .wp-block-columns { display: block; }\n body.page-id-167 .wp-block-cover .wp-block-post-title { font-size: 32px; overflow-wrap: normal; word-break: normal; }\n}\n<\/style>\n\n\n\n<p class=\"wp-block-paragraph\">The RETROCHANGE project provides georeferenced historical satellite imagery datasets derived from declassified KH-9 HEXAGON satellite imagery acquired in 1975.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The original imagery was processed, georeferenced, and mosaicked by the Technical University in Zvolen. The resulting datasets are distributed as GeoTIFF map-sheet packages for retrospective forest and landscape change analysis, historical land-cover mapping, and reproducible geospatial research.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Available Datasets<\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">High Tatras \u2013 1975 KH-9 Satellite Imagery<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Georeferenced mosaic of historical KH-9 satellite imagery covering the High Tatras region of Slovakia and Poland (551 map-sheets).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Acquisition date:<\/strong> 27 June 1975<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"801\" height=\"408\" src=\"https:\/\/gis.tuzvo.sk\/retrochange\/wp-content\/uploads\/2026\/11\/htatras3.png\" alt=\"\" class=\"wp-image-170\" srcset=\"https:\/\/gis.tuzvo.sk\/retrochange\/wp-content\/uploads\/2026\/11\/htatras3.png 801w, https:\/\/gis.tuzvo.sk\/retrochange\/wp-content\/uploads\/2026\/11\/htatras3-300x153.png 300w, https:\/\/gis.tuzvo.sk\/retrochange\/wp-content\/uploads\/2026\/11\/htatras3-768x391.png 768w\" sizes=\"auto, (max-width: 801px) 100vw, 801px\" \/><\/figure>\n\n\n\n<h5 class=\"wp-block-heading\">Poloniny\u2013Bieszczady \u2013 1975 KH-9 Satellite Imagery<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Georeferenced mosaic of historical KH-9 satellite imagery covering the Poloniny\u2013Bieszczady cross-border study area (326 map-sheets).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Acquisition date:<\/strong> 18 September 1975<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"755\" height=\"478\" src=\"https:\/\/gis.tuzvo.sk\/retrochange\/wp-content\/uploads\/2026\/11\/poloniny3.png\" alt=\"\" class=\"wp-image-171\" srcset=\"https:\/\/gis.tuzvo.sk\/retrochange\/wp-content\/uploads\/2026\/11\/poloniny3.png 755w, https:\/\/gis.tuzvo.sk\/retrochange\/wp-content\/uploads\/2026\/11\/poloniny3-300x190.png 300w\" sizes=\"auto, (max-width: 755px) 100vw, 755px\" \/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Data Format and Organization<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Both datasets are distributed as ZIP packages containing GeoTIFF raster tiles organized according to a 1:5,000 map-sheet grid.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Technical specifications:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Format:<\/strong> GeoTIFF<\/li>\n\n\n\n<li><strong>Coordinate reference system:<\/strong> EPSG:5514 \u2013 S-JTSK \/ Krovak East North<\/li>\n\n\n\n<li><strong>Output pixel size:<\/strong> 0.5 m<\/li>\n\n\n\n<li><strong>Map-sheet extent:<\/strong> 2.5 \u00d7 2.0 km<\/li>\n\n\n\n<li><strong>Acquisition year:<\/strong> 1975<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The 0.5 m pixel spacing describes the output raster grid and does not imply 0.5 m positional accuracy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Each package includes supporting documentation, metadata, licensing information, and recommended citation instructions.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Access and Download<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Explore the available datasets, view their geographic coverage, and access the GeoTIFF packages through the RETROCHANGE Data Download Portal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Registration is required before downloading RETROCHANGE data. Subscription to project news and updates is optional.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/maps.tuzvo.sk\/retrochange\/DataDownload.aspx\" target=\"_blank\" rel=\"noopener\">Browse and Download RETROCHANGE Data Packages<\/a><\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">License and Terms of Use<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The RETROCHANGE-derived datasets are made available under the <strong>Creative Commons Attribution 4.0 International (CC BY 4.0)<\/strong> license, to the extent of the rights held by the Technical University in Zvolen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The license permits sharing, adaptation, and reuse, including commercial use, provided that the applicable attribution requirements are met.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The original KH-9 satellite imagery was obtained from the <strong>U.S. Geological Survey (USGS), Earth Resources Observation and Science (EROS) Center<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Positional and radiometric accuracy may vary due to the characteristics of historical satellite imagery and the georeferencing process. The datasets are not intended for cadastral, legal, engineering, or survey-grade applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For detailed information on data provenance, processing, citation, and licensing, please refer to the README.txt, METADATA.txt, and LICENSE.txt files included in the data packages.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>License:<\/strong> <a href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\" target=\"_blank\" rel=\"noopener\">Creative Commons Attribution 4.0 International<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The RETROCHANGE project provides georeferenced historical satellite imagery datasets derived from declassified KH-9 HEXAGON satellite imagery acquired in 1975. The original imagery was processed, georeferenced, and mosaicked by the Technical University in Zvolen. The resulting datasets are distributed as GeoTIFF map-sheet packages for retrospective forest and landscape change analysis, historical land-cover mapping, and reproducible geospatial [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-167","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/gis.tuzvo.sk\/retrochange\/index.php?rest_route=\/wp\/v2\/pages\/167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gis.tuzvo.sk\/retrochange\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/gis.tuzvo.sk\/retrochange\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/gis.tuzvo.sk\/retrochange\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/gis.tuzvo.sk\/retrochange\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=167"}],"version-history":[{"count":10,"href":"https:\/\/gis.tuzvo.sk\/retrochange\/index.php?rest_route=\/wp\/v2\/pages\/167\/revisions"}],"predecessor-version":[{"id":289,"href":"https:\/\/gis.tuzvo.sk\/retrochange\/index.php?rest_route=\/wp\/v2\/pages\/167\/revisions\/289"}],"wp:attachment":[{"href":"https:\/\/gis.tuzvo.sk\/retrochange\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}