Tom Young is a Cubs fan, and also a fan of Wrigley Field. About 12 years ago, he and his friend Marvin Larson were looking around for a "blueprint-style" poster of Fenway Park; not finding one, they decided to create their own.
To make a long story short, they not only created a Fenway "blueprint" -- no, it's not a real blueprint, just blueprint-style, although they were able to obtain blueprint drawings of Fenway and incorporated it into the Fenway print -- they also created posters of Yankee Stadium, Busch Stadium, and Wrigley Field, which is the image you see at the top of this post. Young described the process to me:
Essentially, I take photographs (my own, which slows down production!) and convert them through a process I've kind of developed on my own into these blueprint-style line drawings. This conversion is incredibly time consuming (also keeping our release schedule on a long-scale timeline!), as I have to render the lines and then go through and 'clean up' all of the extraneous things... removing trees, cars, lampposts, etc.
I think these are really nice-looking posters, and a different and offbeat way of showing Wrigley. It didn't take me long to figure out what day is represented on the scoreboard on the image (it's one of the better days in recent Cubs history; if you want to guess, guess before you click this link for the answer, and don't give it away in the comments!).
If you're interested in one of these, you can order them through the Ballpark Blueprints website. I should note I have no financial interest in this myself, just was contacted by Tom Young and thought these would be of interest to you. Tom did send me a few copies of the poster, which is 18 x 24 inches and just as cool as it looks here. Here's a larger version of the image at the top of this post, in case you can't read the scoreboard above (click to embiggen).