Random Rural Map IV - with added grid

Random Rural Map IV - with added grid

Something simple to use to teach my rather Luddite Niece, who is an avid role player  the wonders of on line gaming done in A3 with a 25mm grid intended for a random encounter in the woods which lays the hook which leads onto the rest of the adventure. Just need to work out how to get this up on roll d20 any one know if you can import pictures drawn off line?

Not I think quite to my usual standard but meant be quick to draw and using water colour like 50% opacities to allow the grid to show through - the intended grid scale is 5' my normal indoor scale is 3' to the inch