{
  "version": 1,
  "title": "Physiographic Regions of Canada — official Regions layer",
  "accessedAt": "2026-10-02T03:35:58.801Z",
  "source": {
    "catalogueId": "a3dfbaf4-1b20-4061-aa0a-e7a79953f52d",
    "publisher": "Government of Canada; Natural Resources Canada",
    "catalogueUrl": "https://open.canada.ca/data/en/dataset/a3dfbaf4-1b20-4061-aa0a-e7a79953f52d",
    "created": "2019-01",
    "published": "2019-04-01",
    "temporalCoverageStart": "2017-09-01",
    "catalogueModified": "2022-01-12",
    "licence": "Open Government Licence - Canada 2.0",
    "licenceUrl": "https://open.canada.ca/en/open-government-licence-canada",
    "attribution": "Contains information licensed under the Open Government Licence – Canada."
  },
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    "sourceCrs": "EPSG:3978",
    "sourceCrsName": "NAD83 / Canada Atlas Lambert",
    "deliveryCrs": "EPSG:4326",
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    "vertexCount": 32042,
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    "simplificationApplied": false,
    "coordinateRoundingApplied": false,
    "originalResponseBytesPreserved": true,
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  },
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    "closedRings": true,
    "polygonSelfCrossings": 0,
    "polygonHoleErrors": 0,
    "betweenPolygonProperCrossings": 0,
    "betweenPolygonFilledContainments": 0,
    "originalSharedEdgeSegmentPairs": 1641,
    "originalEndpointContactPairs": 3598,
    "note": "Shared edges and endpoint contacts belong to the original region partition and are preserved. Shared-edge counts are segment-pair counts, not positive-area overlaps."
  },
  "limitations": [
    "These are broad national physiographic regions, not elevations, terrain observations, agricultural land or administrative regions.",
    "Catalogue publication, temporal coverage and catalogue modification dates are distinct. The separately linked 1970 raster guide does not establish a 1970 reference year for this vector.",
    "Label anchors are cartographic positions verified inside the original region geometry, not observation stations."
  ],
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  "sourceEvidenceNote": "Unmodified source metadata and licence responses are retained in the repository evidence directory. The site serves the exact geometry and this extraction manifest; readers can inspect the official metadata and licence through their source URLs."
}