Neighborhood boundaries can be difficult to define. They don't usually have hard and fast borders written into law like municipalities or legislative voting districts, so the lines are liquid. It's a lot of guesswork and old codgers explaining why this park is a part of their neighborhood because back in whenever-ought-four Councilman Humperdink* said as much.
With that in mind, the folks over at Loveland went about crowd-sourcing a map of Detroit's neighborhood boundaries. Considering the informal nature of neighborhoods, crowd-sourcing is as logical and accurate a method to draw these lines as anything else.
Curbed: Previous attempts at mapping the city's 'hoods (including the one Google Maps is based off of) have shied away from labeling uncertain areas. Not this one. [Creator Alex] Alsup essentially wanted to label the whole of Detroit in the most informed way possible, then leave it up to the public to throw their two cents in.
The project is ongoing, so you can add your perspective at Why Don't We Own This?
*There was no actual Councilman Humperdink. We know this. It is a bit of rhetorical flair. If you were poised to educate us on the non-existence of such person, we appreciate your concern.