One of the things that will drive any Boston reporter or editor insane over the years is trying to figure out just where the lines are between Boston neighborhoods. Is the Hotel Alexandra in Roxbury or the South End? Would the proposed Roxbury Prep school be in Roslindale or West Roxbury? Where, exactly, does Comm. Ave. stop being Allston and start being, um, whatever that thin strip is that connects it to the rest of Boston?
City planners face the same exact problem.
Some folks at the Department of Neighborhood Development created an interactive map that lets you see the differences between what DND considers the borders of a particular neighborhood and what the Boston Planning and Development Agency consider its borders.
The DND staffers created the map as they were geocoding their data so that they could meet requests for neighborhood data that matched up with both agencies' definitions of where one neighborhood ends and another begins.
Also see Bostonography's attempt to crowdsource Boston neighborhood lines.