exporting a non-cut off EPS file

Trying to view the EPS files that inform exports. I can only view it in a sort of cut-off version. Do I need Adobe Illlustrator even to view it?

I’m wishing I could see it, so I could futz with it a bunch, and then give it to a graphics friend of mine to finish up. But since I can’t see the right half of the file, it is tough.

I just tried opening this in Gimp on Ubuntu and it failed, however Inkscape opened it just fine. My test map is a 5x5 grid, so not the largest.

I think the page defaults to an A4 (or US letter, can’t be sure) so the eps is actually partial if the map is big. You need a vector software like AI, yes.