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    "abstract": "A map of Signy Island, South Orkney Islands. Rock outcrop, moraine and lakes are shown on land, displayed over a subtle hillshade to represent terrain. Contours are shown at 20 m intervals, and spot heights for some of the highest peaks are also displayed. Selected place names are also included.\n\nMap projection: WGS84 UTM Zone 23S, Central Meridian 45°40'W. Vertical datum: Mean Sea Level (MSL) at Signy Research Station. MSL as defined by the tide gauge at the station. To transform data from WGS84 to Signy MSL, apply a local correction factor of -32.235 m (MSL is below WGS84).\n\nData sources and references can be found in the lineage.\n",
    "purpose": "A map of Signy Island with a hillshade, contours and land cover.",
    "dates": {
      "creation": "2025-06-11",
      "publication": "2025-06-11",
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    "other_citation_details": "Produced by the Mapping and Geographic Information Centre, British Antarctic Survey, 2025, version 1, [https://data.bas.ac.uk/maps/1011](https://data.bas.ac.uk/maps/1011).",
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          "postal_code": "SN2 1FL",
          "country": "United Kingdom"
        },
        "online_resource": {
          "href": "https://www.ukri.org",
          "title": "UKRI - UK Research and Innovation",
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    ],
    "maintenance": {
      "maintenance_frequency": "asNeeded",
      "progress": "completed"
    },
    "graphic_overviews": [
      {
        "identifier": "overview",
        "href": "https://cdn.web.bas.ac.uk/add-catalogue/0.0.0/img/items/814cb7e7-a111-4fe0-89e0-a162f7fa02e7/1011-thumbnail.png",
        "description": "General overview of resource",
        "mime_type": "image/png"
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        "statement": "Open Access (Anonymous)"
      },
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        "type": "usage",
        "restriction_code": "license",
        "statement": "This information is licensed under the Open Government Licence v3.0. To view this licence, visit https://www.nationalarchives.gov.uk/doc/open-government-licence/.",
        "href": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/"
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    ],
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    "supplemental_information": "{\"physical_size_width_mm\": 190, \"physical_size_height_mm\": 240}",
    "spatial_resolution": 38000,
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    "language": "eng",
    "extents": [
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        "identifier": "bounding",
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            "east_longitude": -45.57,
            "south_latitude": -60.75,
            "north_latitude": -60.67
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      "statement": "Map produced in ArcGIS Pro v3.3. Data sources: \n\n* Coastline: SCAR Antarctic Digital Database, 2024.\n* Rock outcrop, lakes, moraine and streams: Gerrish, L., & Ireland, L. (2024). Land cover of Signy Island, consisting of rock outcrop, moraine, lakes, permanent ice and streams, digitised from February 2020 satellite imagery (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/af80c82c-b6a0-4978-92e0-efe063c390af\n* Contours and hillshade: derived from a Digital Elevation Model produced from a stereo-pair of WorldView-3 satellite images acquired March 2015. Satellite imagery © 2015 Maxar Technologies.\n* Spot heights: derived photogrammetrically from the above stereo-pair of images.\n* Survey points: BAS GPS Survey, February 2002."
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