Subseries consists of maps, charts, and plans collected by Verner, the majority of which appeared in atlases and books. Subseries also includes a few manuscript maps. The maps, charts, and plans are mainly of North America, in particular the western and northern parts, and of eastern Russia and China. There are many maps of Northern Canada, the North Pole, Bering Strait, British Columbia, Washington, Oregon, California, and the Pacific Ocean. A number of maps feature the tracks of the ships of explorers such as Cook, Vancouver, La Perouse, Muller, Cluny, De Fonte, Dixon and Meares, Mackenzie and Hearne.
The maps are engraved and lithographed. Mapmakers from Europe and North America include Aaron and John Arrowsmith, Didier Robert de Vaugondy, Abraham Ortelius, Guiljelmo Blaeu, Gerard Mercator, Jodocus Hondius, Sebastian Munster, Reynold [Renier] Elstracke, Guillaume de L'Isle, Renier and Joshua Ottens, Herman Moll, Isaac Brouckner, Isak Tirion, Thomas Jeffreys, Philippe Buache, Pierre Francois Tardieu, L. Aubert, Neele, Joseph Nicholas de L'Isle, Christian Gotleib Theophil Reichard, George H. Swanston, Adrian Hubert Brue, Alexander Kincaid, J. and C. Walker, Jehoshaphat Aspin, Sidney Hall, Illman & Pilbrow, C.V. Monin, Laguillermie, Mardelet, Samuel Parker, M.M. Peabody, Thomas Foot, J. Bartholemew, Edward Weller, Edward Stanford, August Sontag, Dr. E.K. Kane, James Wyld, and James Alden.