Johannes van Loon
42.5 x 54.5 cms
The first, the most famous, most wanted and the rarest of all sea charts of California as an island. Only a handful of examples have survived. Due to its rarity and historical importance, the map is legendary.
The map is not a mere copy of any of the existing charts at the time, so van Loon must have received new information. The Van Loon is a unique chart that does not rely on the earlier charts by Colom and Doncker.
"This is the second of two important charts introduced in the 1666 edition of Johannes van Loon's Zee Atlas.
Along with the similar Pieter Good chart of the same year, this is one of the most desirable of all California as an island maps. They are the first folio maps dedicated to this curious cartographic phenomenon. It has not been proved which appeared first, but it is believed that the van Loon most probably takes pride of place. This is because the van Loon atlas was the most innovative of the two, while Goos largely drew upon existing charts.
Many authorities have applied the date of 1661 to its first appearance. However, it is not known to be present in any earlier edition than that of 1666."
"Joannes van Loon was an accomplished mathematician and astronomer. His first cartographic involvements were with Theunis Jacobsz during the 1640s. From 1650 he worked with Joannes Janssonius, engraving amongst other worksthe plates for his Celestial Atlas by Cellarius, 1660.
In 1661 he published his first work with his brother, Gillis; the 'Zee Atlas' contained thirty-five maps. In 1666 the plates were Jan Jansson van Waesberge, with whom he then co-published the atlas. This edition was expanded to forty-seven maps, and by 1676 there were fifty."