You're a new guy, so not being harsh, this isn't the place to post this question - should probably go to the general discussion forum.

So a CL should move this.

Regarding size and format - if a map is only going to be viewed on a monitor for use as a VT app map, you're probably right.

Know this though, all the maps I create are intended to be printed large format from 18" x 24" up to 36" x 48" and larger. All my maps are designed this way. In my thinking why would anyone limit themselves to 900 pixels? But then, I run an RPG map printing shop, and I'm just skewed that way!

GP