The two atlases of the American travel account are based on earlier map series by American and European cartographers, which Humboldt used as points of reference. While working on his atlases, Humboldt was in contact with American (José Manuel Restrepo, Joaquín Acosta) and European (Adrian-Hubert Brué, Pierre Lapie, Jean-Baptiste Joseph Delambre) cartographers, draughtsmen and engravers.This exchange is richly documented in <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://kalliope-verbund.info/DE-611-BF-42736">Volume 7</ref> and <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://kalliope-verbund.info/DE-611-BF-42737">Volume 8</ref> of the Krakow papers and will be comprehensively covered in this thematic section.