Show HN: Interactive Map you can drag a country to Mars/Moon/Jupiter

#1

Post by loa_observer » Mon, Jan 05, 2026, 3:22 PM UTC

I made a drag-and-drop playground: pick a country, drop it onto Mars/Moon/Jupiter, and see how large it looks there.

Demo: https://www.runcell.dev/tool/true-size-map

Open source: https://github.com/ObservedObserver/world-map-reality;

happy to take feedback / PRs.

Show HN: Interactive Map you can drag a country to Mars/Moon/Jupiter
runcell.dev

Re: Show HN: Interactive Map you can drag a country to Mars/Moon/Jupiter

#2

Post by PaulHoule » Mon, Jan 05, 2026, 3:48 PM UTC

Pretty cool but when you are dragging a country to the planet the country is behind the planet which means I don't expect the drop to work. It should go in front and probably the planet should give some indication that the drag should work.

First time I looked at it I didn't find the country selector because that requires scrolling down.

It's not clear how to remove a country, though I do like it that I can change planets and see the same country. I'd consider turning the planet selector into a dropdown (maybe even on the planet window) which would let the country selector ride up and be more obvious.

Re: Show HN: Interactive Map you can drag a country to Mars/Moon/Jupiter

#3

Post by loa_observer » Mon, Jan 05, 2026, 4:28 PM UTC

PaulHoule wrote: post #2

Pretty cool but when you are dragging a country to the planet the country is behind the planet which means I don't expect the drop to work. It should go in front and probably the planet should give some indication that the drag should work. First time I looked at it I didn't find the country selector because that requires scrolling down. It's not clear how to remove a country, though I do like it that I can change pl…

thanks for the ux feedback, will ship a better version soon. by the way, there is a fullscreen model which the drag-and-drop experience might feel better