The program recognizes all kinds of files, from low-resolution JPG images up to vector maps that allow you to zoom in with great detail. Of course, you can also use Google Maps and Google Earth maps, even importing them in 3D.
OkMap's features are accessible for any user, but are especially geared toward users who need maps to do things like mount a rescue in a forested area, or people who like to go mountain biking or fishing, or pilot a boat or a plane.
OkMap has many layers and is full of possibility. It'll work well whether you want to use it to draw a simple GPS route, or to plan a full day of backwoods hiking.