John Horrigan Antique Maps

@jhmaps.bsky.social

A wide selection of 18th to 20th century maps - local (Edmonton), regional, & worldwide. Research, collection advice, presentations, and displays.

Van Langren's estimate of longitude vs. those of his predecessors. Google says the correct distance is 177 to 180 German miles.

Michael Friendly@datavisfriendly.bsky.social · 4mo ago

#TodayinHistory #dataviz #Onthisday #OTD 📊 📅Mar, 1628 [no day] Michael Florent van Langren presented the FIRST STATISTICAL GRAPH, in a letter to Isabella of Spain [Friendly-etal:2010] A simple 1D dot plot, showing the 'extravagent errors' in estimates of longitude 👀 bit.ly/3DXaBZJ for the story

Detail of a letter sent by Michael Florent van Langren to Princess Isabella of Spain. It shows a one-dimensional line graph representing estimates of the longitude distance from Toledo to Rome. Seven estimates are shown as points on this line. Above each is the name of the astronomer who gave that estimate.
The goal was to convince the King of Spain to fund van Langren so that he could find the solution to the longitude problem.

A rare copy of Vergil’s _Anglica Historia_, with 4 ms. maps has come on the market. Previously owned by #QueenMary, "...the book and its #maps are perhaps the most significant artifact of #Tudor intellectual history still in private hands." #antiquemaps

Rare Atlas Owned by Queen Mary I Could Sell for $1.6 Million

When a savvy book dealer bought an atlas that Queen Mary I of England once owned, they weren't expecting to find the first maps of Britain.

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