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Service Description: 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
Map Name: htatras_epsg3857
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Layers:
Description:
Copyright Text: 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.
Spatial Reference:
102100
(3857)
Single Fused Map Cache: true
Tile Info:
- Height: 256.0
- Width: 256.0
- DPI: 96.0
-
Levels of Detail: 24
-
Level ID: 0
[ Start Tile, End Tile ]
- Resolution: 156543.03392799999
- Scale: 591657527.591555
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Level ID: 1
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- Resolution: 78271.516963999893
- Scale: 295828763.79577702
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Level ID: 2
[ Start Tile, End Tile ]
- Resolution: 39135.758482000099
- Scale: 147914381.89788899
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Level ID: 3
[ Start Tile, End Tile ]
- Resolution: 19567.879240999901
- Scale: 73957190.948944002
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Level ID: 4
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- Resolution: 9783.9396204999593
- Scale: 36978595.474472001
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Level ID: 5
[ Start Tile, End Tile ]
- Resolution: 4891.9698102499797
- Scale: 18489297.737236001
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Level ID: 6
[ Start Tile, End Tile ]
- Resolution: 2445.9849051249898
- Scale: 9244648.8686180003
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Level ID: 7
[ Start Tile, End Tile ]
- Resolution: 1222.9924525624899
- Scale: 4622324.4343090001
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Level ID: 8
[ Start Tile, End Tile ]
- Resolution: 611.49622628138002
- Scale: 2311162.2171550002
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Level ID: 10
[ Start Tile, End Tile ]
- Resolution: 152.874056570411
- Scale: 577790.55428899999
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Level ID: 11
[ Start Tile, End Tile ]
- Resolution: 76.437028285073197
- Scale: 288895.27714399999
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Level ID: 13
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- Resolution: 19.109257071268299
- Scale: 72223.819285999998
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Level ID: 14
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- Resolution: 9.5546285356341496
- Scale: 36111.909642999999
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Level ID: 16
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- Resolution: 2.38865713397468
- Scale: 9027.9774109999998
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Level ID: 17
[ Start Tile, End Tile ]
- Resolution: 1.1943285668550501
- Scale: 4513.9887049999998
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Level ID: 19
[ Start Tile, End Tile ]
- Resolution: 0.29858214164761698
- Scale: 1128.4971760000001
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Level ID: 20
[ Start Tile, End Tile ]
- Resolution: 0.14929107082380833
- Scale: 564.24858800000004
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Level ID: 21
[ Start Tile, End Tile ]
- Resolution: 0.074645535411904163
- Scale: 282.12429400000002
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Level ID: 22
[ Start Tile, End Tile ]
- Resolution: 0.037322767705952081
- Scale: 141.06214700000001
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Level ID: 23
[ Start Tile, End Tile ]
- Resolution: 0.018661383852976041
- Scale: 70.531073500000005
- Format: Mixed
- Compression Quality: 75.0
- Origin: X: -2.0037508342787E7
Y: 2.0037508342787E7
- Spatial Reference: 102100
(3857)
Storage Info:
- Storage Format: esriMapCacheStorageModeCompactV2
- Packet Size: 128
Initial Extent:
XMin: 2166175.9152343953
YMin: 6270969.30563313
XMax: 2284182.663403216
YMax: 6344995.207247157
Spatial Reference: 102100
(3857)
Full Extent:
XMin: 2166175.915234395
YMin: 6276437.027555602
XMax: 2284182.663403216
YMax: 6339527.4853246845
Spatial Reference: 102100
(3857)
Units: esriMeters
Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP
Document Info:
Title: Map
Author:
Comments:
Subject:
Category:
Keywords: 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
AntialiasingMode: Fast
TextAntialiasingMode: Force
Supports Dynamic Layers: true
Resampling: false
MaxRecordCount: 2000
MaxSelectionCount: 2000
MaxImageHeight: 4096
MaxImageWidth: 4096
Supported Query Formats: JSON, geoJSON, PBF
Supports Query Data Elements: true
Min Scale: 4622324.4343090001
Max Scale: 564.24858800000004
Min LOD: 7
Max LOD: 20
Supports Datum Transformation: true
Child Resources:
Info
Dynamic Layer
Supported Operations:
Export Map
QueryLegends
Return Updates