The original tracing of areas like the water area was done based on the master plan of the development. I guess they ended up not creating the water features as originally planned in the master plan.

In that case, it would make sense to remove them from the map and instead add whatever ended up being built on ground in that location. In this case, to me it looks like a garden of sorts, based on satellite imagery. If that looks correct to you as well, I would go ahead and map it as such.