Print and monitors aren't directly comparable. Print needs higher DPI because people will literally hold a map up to their face to look at fine detail. You ju

Print and monitors aren't directly comparable. Print needs higher DPI because people will literally hold a map up to their face to look at fine detail. You just zoom a digital map instead. If you aren't holding your face up to your monitor, you don't need 800dpi. The original iPhone "retina" display was 326ppi and that was assuming a 12 inch viewing distance. For monitor viewing distance, you'll be 20 or more inches away, making 280ppi plenty for the vast majority of people.