I drew the Bird's Eye View Map of Budapest originally (in 1990) with a technical pen (Rapidograph) on tracing paper, the size was roughly 150 x 100 cm. A few years ago I digitalized and modified, colorized it with Wacom Cintiq digital pen in Photoshop. I made a few versions. And nowadays I make prints.
Giclée prints, simple digital prints, and offset posters of the Bird's Eye View Map of Budapest in various sizes from postcard size to 150 x106 cm, or even 5 x 4 m size wallpaper.