importing maps

If I have a map 10' by 10', then what should an imported image be in pixels to match the grid at 100%? I'm having trouble figuring that out. If I create a map in photopshop on a 10' by 10' canvas, and export at full size, why does the image appear tiny when I drag and drop it into Roll20? Wouldn't it make more sense for it to fill the space it was designed to fill on the map layer?

I have the same problem, which makes it very difficult to use prepared maps and tokens. Imho, the best solution would be to drop inches (which makes no sense at that scale) and just use pixels. I mean one pixel of what you import becomes one pixel in Roll20 and you decide how many pixels per square. As Roll20 works now, I have to disable the grid or eyeball the scale, or both. Not easy to use nor user-friendly.

With Maptool, you drop the map image in, adjust the pixel size of the Maptool grid (which can be done visually), and you're done. I don't run into the same resolution problems, because I'm not forced to resize images. Somebody needs to create a tile-based map making program that has a quick "export to roll20" function. Or maybe it would be nifty if the roll20 fellows created an import option...one that would convert the user defined pixel size. The import should analyze the imported images's map grid and display it in the correct proportions in the window. No more messing around with the resizing, which is clumsy.