Lobby art: a giant real-time globe
Some years ago, Al Gore wanted to spend a lot of money to put up a satellite which would transmit a live view of the whole Earth (well the half it could see) to make people more eco-conscious.
I figured it should be possible to generate the same view with some careful combination of weather satellite images and other satellite images. Yes, sometimes the view in one place might be an hour old while it's near live in another, but with clever blending you would never know.
So the next thing I want somebody to do with this is build a giant globe to go in some corporate or museum lobby, and project this image of the planet onto it. That's not so easy, since I want lots of resolution which means many overlapping projectors.
Ideally you would project from inside. Antarctica would probably lose out though if you tilted the planet 23 degrees, or even an amount corresponding to the locations lattitude you could find ways to put the bottom on boring ocean. You could also project from outside, which is a challenge since the screen is not equadistant. I don't know if a mix would be possible. As noted, one idea would be to show the Earth at is truly is, so the lit part is looking towards the sun as people see it out the windows.
I would want to get close to the globe, but I think the best view would be from a moderate distance, far enough away that we have one pixel per minute of arc or so, the resolution of the human eye. As close as we can get to seeing it in space. (In that case we would want a darker room, not a lobby, and even put a moon on the walls. But a corporate lobby seems like a better way to fund a project like this.)