Map uploading problems

I have no idea if i'm the only one with this issue, but when ever i upload a map the picture gets slightly messed up. i was trying (mostly failing) to fit my overworld map to the grid and noticed this: the one on the left is a part of the the original file as it is when i view it on my computer. the right is mostly the same area but when it's uploaded to roll20. if you look closely at the area just to the left of the misty river text, it looks as though a tiny sliver of the map got cut out. trying to fit this thing to the hex grid has been a nightmare as it is, and now this. does anyone happen to know why this is happening, and how i could possibly fix it?

I see what you mean. If I had to guess I'd say that your graphic object in Roll20 is a few pixels narrower than the true image. You can right click the graphic and click advanced->set dimensions, then choose pixels to see the size. You may not want to mess with it if you already have the grid right. 

Thank you very much. it worked

Sweet!  No problem. Happy Rolling!