The Caert-Thresoor of 1598 set a new standard for minor atlases. Scholars like Petrus Bertius and Jacobus Viverius edited the text. The small maps are extremely well engraved; they are neat and clear and elegantly composed. They served many purposes in other books published in Amsterdam. Their contents reflect the level of cartography in Amsterdam at the turn of the century, where up-to-date information on newly discovered regions was readily available. The Caert-Thresoor is a collection of maps to which the text was adapted and not the other way around as is the case with many geographical studies.
The first edition was published in 1598 by Barent Langenes, bookseller and publisher in Middelburg. Little is known about Langenes, except that he published some travel descriptions.

Barent Langenes ans his Caert-Thresoor

Barent Langenes, a Dutch bookseller and publisher of Middelburg (Zeeland), about whom little is known, was the first printer of the Caert-Thresoor (1598), a small-size atlas with an exciting history. This atlas had many editions in Dutch, Latin, French, and German, later brought out by Cornelis Claesz and Jodocus Hondius. Langenes was involved in the first two Dutch editions.

The Caert-Thresoor, is a collection of maps to which the text was adapted and not the reverse, as in the case with many geographical studies. The most exciting maps are those of the English and the Dutch in arctic waters, searching for the route to China (Northwest Passage). It records the departure of the third fleet of the Dutch in spring 1596, but not the return of survivors of this tragic voyage in August 1597. This atlas sets a new standard for minor atlases. Moreover, it was affordable to the citizens of the lowest income.
The text was rewritten, first by Petrus Bertius and reissued in 1600, secondly in 1609 by Jacobus Viverius. The edition with original basic text continued to be published until 1609, the year of Cornelis Claesz’s death.