It’s a photograph, taken digitally, like on a camera phone; it was taken from orbit, but looks like a long angle, rather than straight down.
Many thanks! I was confused because they said the hill is located inside a crater, which seemed to rule out a long, long photo from the horizon of the planet. And it still looks like we’re looking up towards the summit. Could even the best satellite get a photo looking *upwards* at the Washington Monument?
I truly enjoy all your civilization posts.