Around 1714 Pieter van der Aa published a pocket atlas in nine volumes. Therefore, he used and reworked the copperplates of the Atlas minor by Johannes Janssonius. The ninth volume of Van der Aa’s Atlas soulagé is devoted to Asia, Africa and America: the other eight volumes are concerned with Europe. Like Mercator’s Atlas minor, this pocket atlas has two maps with Vietnam: Les Indes orientales (India and Indochina) and Isles des Indes orientales (Southeast Asia). It is striking that the region of Cochinchina is indicated in the north and as part of China. The geographical content of the maps is almost identical to those of Mercator (see no. 5).
L’atlas soulagé de son gros & pesant fardeau, ou Nouvelles cartes geographiques. Leiden: Pieter van der Aa, [ca. 1714] (COLLBN Atlas 661: 3).