What is Mapnificent? It’s a a website that uses a Google map to show you how far you can travel by transit and walking combined in an amount of time. It’s like my 30-minute map, except you can choose any origin (I only did it from High & Broad) and the maximum amount of time you want to travel (I only did it for 30 minutes).
There are a couple of minor issues. First, it doesn’t offer a way to choose the time of day you’re traveling, so you may not actually be able to do what it says if you’re traveling in off-peak periods. Second, the walking radii are based on simple circles, not the actual street network. So your access may be limited in some locations. Nevertheless, this is very cool. Here is Mapnificent’s 30-minute map from High & Broad:
For shape comparison, here is an image of my 30-minute map: