I'm working on a shiny app and want to basically take a dungeon map (dungeons and dragons style, see: here for example) and add some custom points to it. Basically I was thinking of putting points on the map where someone could hover over to get more information (say "this room has 37 kindly kobolds").
I am not 100% sure what the best way to accomplish this would be. Is there a good way to load a png as a background image and overlay a scatterplot on top of it (like in plotly)?
Any help would be appreciated. Thanks