Hmmm... Where's the rest of our lake?

Lake Lanier, Georgia. Lately we’ve been losing water due to a severe drought,
but the map (above) shows something a bit different.

What’s going on here?

My first guess is that our big lake/polygon got chopped somewhere along
the line in processing. Too many points just didn’t work somewhere along
the line - but, where?

Does this look like a problem when the data was imported? Or is this a
rendering problem? How do you approach a problem like this?

Thanks for any ideas.

  • Rich