If you want to see some really cool, detailed demographic mapping, including zip code by zip code overlays of FBI Crime Data, then policymaps.com will help you get a better idea of the crime densities per category - murder, rape, aggravated assault, etc.
You will not like what you see in 30311, but don't let that deter you.
The value of the beautiful land in this area of Southwest Atlanta is what counts - there are some large, private lots in neighborhoods like Audubon Forest and Audubon Estates - mid-century brick ranches in good condition - big parks and golf courses nearby and the transformation of Fort McPherson on the way.
Venetial Hills reminds me of Ashford Park 20 years ago.
If there's anything I can do to help, please feel free to contact me at http://www.HernandoLuxuryHomes.com - I'd be happy to help however I can!