Mapping is a staple of the Etrian Odyssey series and is once again making its come back.Draw layouts of dungeons, plot courses, and mark places and items of interest via the mapping feature.
AtlusUSA has published a video to give us a better idea of it;
About Etrian Odyssey Nexus
Mapping makes its return! Draw your surroundings and plot your path so you’ll never get lost again!
Etrian Odyssey Nexus launches for Nintendo 3DSâ„¢ on February 5, 2019!
As the final Etrian installment on 3DS, it’s only natural that we’ve gone all out incorporating all of the best aspects throughout the entire series, including iconic characters, 19 playable classes, and more labyrinths than any other Etrian title.