I'm currently in the process of making an interactive map. From previous knowledge I learned that it was all about pixel count so that the map could cover a large area. This map needs to cover an area twice the size of the Earth.
My original map is at 35000 x 20000 pixels @ 300 dpi. Which gives me great zoomability for the interactive map.
However, I was just contacted by an artist that offered to make the map. And they suggested a size of 9000 x 6000 pixels but at 1200 dpi. Saying that this can be resized up to my original needs without the loss of quality.
My issue here is that I don't understand how that could work. And so, I don't want to start the job and paying for it. Until I'm sure that the end result will be as by my needs.
PS: I do not know if this is the right stackoverflow to be asking this question. And looking at the "Similar Questions" in the right pane, suggest it isn't. If that is true, perhaps somebody can point me in the right direction.
This obviously won't work: DPI matters only for printing. So 9000x6000 in whatever DPI will have to be scaled up to 35000x20000 with loss of quality. Maybe the artist meant something else..?
And the proper stack exchange for this question would be a https://graphicdesign.stackexchange.com