Last week I made a custom map of Minnesota. It shows the sea floor relief for Lake Superior, major and secondary highways, national forests and wilderness areas and native lands.
The map has a size of 24 inch (approx. 61 cm or 7200 pixels at 300 dpi). The designer requested the colored relief as a raster image and the linework as Illustrator file, because she wanted to add her own information to the map and have the ability to edit the existing features.
Here is a downsized view and a crop: