It is designed for a 13x19" sheet of paper, otherwise known as Super-B size. A version exists that doesn't have the labels next to the establishment icons so that it will be legible on a smaller sheet of paper.
When I created this map originally, there were no maps which showed every gallery--one map showed the Pearl having only four galleries, while another only showed members of some organization of galleries (perhaps ten galleries). In actuality, the Pearl actually has over 45 galleries... so to only show 10-20% of that seems like a huge omission. You can easily imagine someone who had not been to First Thursday looking at a map that only shows 4-6 galleries and deciding it was not worth it. I dedicated the map to the goal of showing every gallery. Later I added restaurants, coffeehouses, pubs, public art, bakeries, transit, and gelaterias because people going to First Thursday seem interested in those things.
I am aware there is one block that is out of date: the Craft Museum now has a cluster of galleries in it. I will be updating that shortly.
Portland has a thriving artist community and enthusiastic, youthful crowds surge through the various art walks that occur around the city. Consequently I choose a typeface that I felt would reflect the creative vibe that you feel in this town. You see a lot of bumperstickers that say "Keep Portland weird"... to use Helvetica or Arial would truly be a crime.
Many maps use an index scheme with numbers and letters along the edge, but when you are referring to the mapsheet on a sidewalk and it is folded up from being in your pocket, you cannot see the edges containing the index letters/numbers. Consequently I used a block numbering scheme so that you can read the location of any visible block without having to have the map completely unfolded. The icon namespace is unique, so that if you put this side by side with my corresponding maps of downtown and Northwest 23rd, no two places have the same icon identity (I found other gallery maps having two nearby icons labeled #1).
I used unique colors and shapes for the different classes of establishments (pub, bakery, gallery, etc) to make them as distinguishable as possible. Galleries have the greatest contrast because the focus was on First Thursday and art galleries.
Everyone I give the map to seems to appreciate it. However, there has been no interest in the map by any organization whose goals include publicizing the incredible scope of the Pearl. Consequently one could get the impression that there is some gaping cartographic flaw in the map. Maybe I've just been looking at the map too long--and don't see it. So I look forward to your feedback, as I want to take the map to the next level.