Anime el ascenso y la caída de países históricos

La versión 11 incluye una extensa colección de polígonos para las fronteras de países históricos, los cuales pueden ser utilizados para visualizar el crecimiento (y caída) de muchas naciones e imperios.

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historicalCountryAnimate[entity_, nframes_: 100, opts : OptionsPattern[]] := Module[ {ini, end, step, polygon, times, reducedPolygon, countries, len, frames}, {ini, end} = First[DateList[#]] & /@ Entity["HistoricalCountry", entity][{EntityProperty["HistoricalCountry", "StartDate"], EntityProperty["HistoricalCountry", "EndDate"]}]; step = Ceiling[(end - ini) / nframes]; polygon = ParallelTable[EntityValue[Entity["HistoricalCountry", entity], EntityProperty["HistoricalCountry", "Polygon", {"Date" -> DateObject[{t}]}]], {t, ini, end, step}]; times = Table[t, {t, ini, end, step}]; reducedPolygon = DeleteMissing[ DeleteDuplicates[Transpose[{times, polygon}], Last[#1] == Last[#2] &], 1, 2]; countries = EntityValue[Entity["HistoricalCountry", entity], EntityProperty["HistoricalCountry", "CurrentCountries"]]; len = Length[reducedPolygon]; frames = ParallelTable[ GeoGraphics[{EdgeForm[Red], Blue, GeoStyling[Opacity[.07]], reducedPolygon[[t, 2]]}, opts, GeoProjection -> "Mercator", ImageSize -> 500, GeoRange -> "World", GeoBackground -> GeoStyling["StreetMap"], Epilog -> Text[Framed[Style[reducedPolygon[[t, 1]], 20, Red, Bold], Background -> White], Scaled[{.06, .955}]] ], {t, 1, len} ]; ListAnimate[frames, AnimationRunning -> False, AnimationRepetitions -> 1] ]

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historicalCountryAnimate["RomanRepublic", 100, GeoRange -> {{30, 50}, {-15, 40}}]

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historicalCountryAnimate["MongolEmpire", 100, GeoRange -> {{20, 70}, {20, 140}}]

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