Translation of "밀집도" in English

2003년에 밀집도 기준이 축소됐거든요

So, in 2003, this area was downzoned.

왜 이 구역의 밀집도 기준이 바뀐 거죠?

Lee: Why would people want to downzone this neighborhood?

이 과정에서 많은 구역의 밀집도 기준이 축소됐죠

But a lot of this rezoning was actually downzoning.