This is 5 feet per grid line, I think.

Here's something I've been working on. I 3D printed a bracket to hold a cheap video projector on a camera tripod. Why? To display maps, of course. Right now, it works, but it needs to be repositioned. It's small, but if it were any bigger the players couldn't fit their books, dice, and chips/crisps.

The map is a bitmap export of one of the Cartographers Annual maps. The most difficult part at this point is aligning the map grid with the grid on the whiteboard. The angle, focus, and zoom of the projector must be set once, and then you must align the computer display with the physical grid. If you have to scroll, then you start over. I think I need to buy a board with no grids and just use the ones on the map.

I plan to run a game soon. I'll use my own maps. I can't show them here because I don't want anyone involved to have an early peek.

That's really good... and a little scary. Heights.

While we're doing this, here's Sue (unrelated to anyone here). She helps me map and write code. She wants to give more input than I'd like, but she's welcome to watch. She buries her head under my arm, and I finally got a photo of it.

For Roll20, I just drag the image onto the page. It's dealt well with size and bandwidth on its own. If the image export snaps to CC3 grid squares, then the mapping of Roll20 grids is pretty easy: how many grids wide is it? Bam.