I have an .eps file that contains an outline map of the US, which I generated in R.
I want to open it in Adobe Illustrator and add some lines by hand.
My problem is that the original .eps file has a margin of whitespace around the edge of the map, which I want to keep, but after I open the .eps file in AI and then re-save it (regardless of whether or not I add in any lines first), the image has been resized so that it is just large enough to contain the map and the margins are gone so the two images no longer align.
I've posted before and after shots below, which I converted to .png to post. It's hard to see the difference, but you can see it if you compare the left-side margin.
The hack I came up with was to put a white rectangle that is larger than the map in the background to preserve the margins but I'm worried that might have some unintended consequences down the line and I'd like to know how to do it properly.
Many thanks in advance,