{
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  "underlyingMapTitle": "Carte de la mer caspienne",
  "observationsMonth": "1776-09",
  "publicationYearApproximate": 1783,
  "publicationYearExact": false,
  "license": "Public Domain Mark",
  "licenseSource": "https://www.e-rara.ch/bes_1/content/titleinfo/10064445",
  "credit": "Johann Anton Güldenstädt; Antoine-François Tardieu; Nicolas Gabriel Le Clerc · Universitätsbibliothek Bern, SOB RoEu ka 15:10 · https://doi.org/10.3931/e-rara-31295",
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  "georeferenced": false,
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  "archiveFile": "artifacts/research/dagestan-2026-10-16/caspian-1776-c1783.jpg",
  "publicImage": "./caspian-1776-c1783.jpg",
  "title": "Carte de la mer caspienne · observations de septembre 1776, édition vers 1783",
  "visuallyReadLabels": [
    "Tarku",
    "Derbent"
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  "observationsDateAsPublished": "7.bre 1776",
  "primeMeridianEstablished": false,
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  "politicalBoundaryLegendEstablished": false,
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  "sourceIndependenceFromModernAtlasesEstablished": false,
  "reviewNote": "Carte physique et de toponymes : les noms et les côtes ne sont pas vectorisés en frontières de khanats. Les longitudes de la gravure ne sont pas assimilées directement à EPSG:4326."
}