[wolfpack_mick]

Second this. Happy to pay for 5km2 although i'd probably crop out 1km2. But I'd love to be able to understand what size i'd be able to print that 1km2 at using 300dpi. I guess art prints aren't exactly the core use case for this though.

[bunabhucan]

Round numbers: 0.5m per pixel at 300dpi is 150m per inch so a 1km box is 7 inches by 7 inches. My city website has aerial survey data that looks to be much higher resolution data so you could also try there.