Map is fuzzy, read the forums, still at a loss

I uploaded this map that is   6800x3900 I set the page size to 98x58 which is pretty close to /70 When I drag the image over from my library, it's super small. When try to make the image bigger by grabbing the corner, it become super pixelated. I'm not sure what I am not understanding. Is there a problem with the image? The creator made it for use in Roll20. Am I doing something wrong? Any advise is appreciated.

I would try dragging it in on the Map layer from your desktop. There is a chance that you are not dragging the original image in. I also see that it is 5440x3680, so once you get it onto the map right click and go to advanced and select set dimensions. Change the setting from units to pixels and enter the above measurements. That should do it.  Happy Gaming

Oh F*ing mother of god. In all of my googling around this problem, that simple solution never came up (advanced setting: set dimensions). Thank you.

I stole that map for further "research", it's pretty neat.

uh.... ditto. :)

It's a very nice map.  Might even be better than the original.   (It's the southern portion of Wave Echo Cave from Lost Mine of Phandelver.)