Map index A, B, C, 1, 2, 3 just look like part of the map

[jidanni]

In https://mbasic.facebook.com/ccartoa/photos/a.540232859448610/2185230731615473/ we see the map index A, B, C, 1, 2, 3 just look like part of the map. Perhaps move them right on top of the margins, with red circles around them.

[jidanni]

OK I should have filed this in https://github.com/hholzgra/ocitysmap/