Racial Gerrymandering

This is one of the most interesting reports I have come across on the internet. It describes in detail a process where populations of african-americans are excluded from the local political process by placing their homes outside of city limits. It doesn't focus on the souths' major metropolitian areas, but it instead surveys small communities.
Buried deep within it we find that local governments have a mandate to maximize revenue, thus they cannot be reasonably expected to integrate nonrevenue producing properties into their cities. They do at their discretion, however, maintain effective governmental control of the properties.