While the site is now defunct, Oracles, Thinkquest.org site consolidated a series of country boundary data into shapefiles. Created as an educational site in 1996 and acquired by Oracle in 2002, the site went defunct in 2013. Thanks to the Wayback Machine, the shapefiles of country boundaries spanning between 2000 BCE and 1994 CE can still be downloaded. The data itself should be used with caution and only for small scale projects. Created by students, the archived disclaimer page explains that the data has a spatial error of roughly +/- 40 miles and the best available information, especially for the oldest years, is not the most reliable.

gislounge.com

Found through aourednik/historical-basemaps

import topology { getCollection, collectionNames } from 'world-historical-gis-data'

A topojson containing all the data.

Takes a collectionName and returns a GeoJSON FeatureCollection

const year_1000 = getCollection('1000')

And array of available collections.

[
  '1000',
  '1000BC',
  '1279',
  '1492',
  '1530',
  '1650',
  '1715',
  '1783',
  '1880',
  '1914',
  '1920',
  '1BC',
  '2000BC',
  '200BC',
  '323BC',
  '400',
  '500BC',
  '600',
  '800',
  'world',
]

world is the basemap and containing the whole world.

To download the data and create the topojson:

./scripts/prepare.sh