A/B/C/D/etc... Warzone maps of Columbus (and other cities)?

[Jessey Kwong]

I remember seeing a post with a map that colorizes type of neighborhood ranking from A-F categories and warzone. Not even sure what these maps are called that break down each neighborhood.

I'm specifically looking for a map of Columbus and would love to get to know the area a bit more as this would be an OOS investment.