where was maycomb compared to finch's landing?

Maycomb is 20 miles east of Finch's landing.

I'm not sure what you mean by "where". Hopefully this helps a little.

It's location far away from the river that forms the area’s main transportation route means that hardly anyone ever moves to Maycomb or away from it. Because of this, families have known each other for generations, establishing the reputations which Aunt Alexandra refers to as “streaks".