The US Department of Justice recently released the latest edition of Geography and Public Safety (vol. 2, issue 2). The most recent issues features articles on the subject of neighborhoods—boundaries, patrols, spaces, etc.
You can download the entire issue as a PDF, here: http://www.ojp.usdoj.gov/nij/maps/gps-bulletin-v2i2.pdf
Get on the National Crime Map at CrimeReports.com