It worked, but it was kind of ugly and the tape needed to be replaced each time it was opened.
At the "adventure" store, I found the Ortlieb map holder (intended for the Ortlieb handlebar bag). It's a very flexible plastic with built in snaps and holes for securing it to the bag. It's also waterproof. Yay. I had to fend of three people to get it (all hovering around the area but not committing) and the guy in line ahead of me was also buying one.
It's been that kind of rainy wet summer.
I wasn't absolutely sure, but luckily it turns out that the will fit nicely on my bag.
|Flipped up for guidance and assurance.|
|Flipped down for the moments when I am not lost.|
Next challenge: Map folding.