| snippet:
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Cached 1975 KH-9 HEXAGON imagery of the High Tatras in Web Mercator (EPSG:3857), optimized for web mapping and prepared within the RETROCHANGE project. |
| summary:
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Cached 1975 KH-9 HEXAGON imagery of the High Tatras in Web Mercator (EPSG:3857), optimized for web mapping and prepared within the RETROCHANGE project. |
| extent:
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[[19.4608184632497,49.0097626608792],[20.5210064791586,49.3801464125639]] |
| accessInformation:
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Source imagery: Declassified KH-9 (HEXAGON) satellite imagery courtesy of the U.S. Geological Survey (USGS), Earth Resources Observation and Science (EROS) Center. Georeferencing and processing: Technical University in Zvolen, RETROCHANGE project. |
| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
|
1.7976931348623157E+308 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Map Service","Service"] |
| description:
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This cached map service provides georeferenced high-resolution KH-9 HEXAGON satellite imagery acquired in 1975 and covering the High Tatras region of Slovakia and Poland. The original declassified satellite imagery was obtained from the U.S. Geological Survey (USGS), Earth Resources Observation and Science (EROS) Center. The imagery was georeferenced and processed by the Technical University in Zvolen within the RETROCHANGE project.
The service uses Web Mercator (EPSG:3857) and a predefined tile cache optimized for fast visualization in web mapping applications and for integration with common web basemaps and online map services. It is intended primarily for web applications, interactive map viewers, and GIS clients using Web Mercator.
The dataset is intended for retrospective analysis of forest and landscape change, historical land-cover mapping, forest monitoring, forest fragmentation and edge analysis, landscape structure assessment, and comparison with contemporary geospatial datasets.
Positional accuracy may vary spatially due to the characteristics of historical satellite imagery and the georeferencing process. The dataset is not intended for cadastral, legal, engineering, or survey-grade applications.
Coordinate reference system: EPSG:3857 – WGS 84 / Pseudo-Mercator
Service type: Cached map service
The same dataset is also available as a dynamically rendered service and as a cached S-JTSK / Krovak East North (EPSG:5514) service.
Project: https://gis.tuzvo.sk/retrochange |
| licenseInfo:
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Publicly accessible for research, education, environmental monitoring, and other lawful uses. Users are requested to acknowledge the original USGS imagery and RETROCHANGE processing when using the service, derived products, or figures. The dataset is provided “as is” without warranty of positional or thematic accuracy. |
| catalogPath:
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|
| title:
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htatras_epsg3857 |
| type:
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Map Service |
| url:
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|
| tags:
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["KH-9"," HEXAGON"," historical satellite imagery"," 1975"," High Tatras"," Vysoké Tatry"," Tatry"," S-JTSK"," Krovak East North"," EPSG:3857"," cached map service"," tile cache"," GIS"," remote sensing"," RETROCHANGE"," EOSC"," Slovakia"," Poland "] |
| culture:
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sk-SK |
| portalUrl:
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|
| name:
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htatras_epsg3857 |
| guid:
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B8D6C107-EE6A-43D2-9A30-7ABBEC04E882 |
| minScale:
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0 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |