INTRODUCTION - It's the following, for a university chair I'm making an application that will be an accessory to assist in face-to-face RPG tables, it has rooms in which the master and players can manage tokens, I just want to do one more thing, a map where all the players in the room could see and move their "miniatures" in it the master could put their monsters, but without animation, it would be just to replace the paper map that is normally used in face-to-face sessions.

PROBLEM - To do the map explained in the introduction, I looked for some tools but I did not find any good, so I would ask to be told APIs to do this, if someone has already played table RPG knows more or less how I want to do, I will leave an image of the roll 20 that is more or less similar, and some more images of how I want it to stay on the cell phone for those who never played understand , I just need to know a good tool to do this.

I want the master himself to put the image that will be used when starting the map (photo or maybe tiled map).

It can be solutions for web to and call the website into application, literally anything that does what I want will help.

If you can help me, I'll be grateful, sorry for the awful English.