The City of Pittsburgh 's mapping department defines neighborhoods to be contiguous with federal census tracts .
As a result considers Friendship to abut Bloomfield at South Graham Street , at the western edge of census tract 807 .
The City of Pittsburgh 's mapping department defines neighborhoods to be contiguous with federal census tracts , and as a result considers Friendship to abut Bloomfield at South Graham Street , at the western edge of census tract 807 .