No it’s not a party line. It’s an almost perfectly straight line running north-south along 16th Street, passing through the White House, and then continuing along the Potomac River to the south. It divides two very different sides of the DC area.
These graphs are a cross-section of the DC area that looks at how the city changes as you travel from the center to the periphery. I’ve split the graphs into two sides based on the east-west dividing line. You’ll notice the first one or two miles to the east are much like their western counterparts (this is essentially the area around Capitol Hill and the National Mall). After that, the two sides diverge pretty dramatically. Continue reading
With input from Hamilton, I’ve been looking recently at how metropolitan areas change as one travels from the center to the periphery. The following charts show the percent of the population 25 and older with bachelor’s degrees. The graphs are based on concentric rings coming out from the center of downtown. I’ve included reference maps with distances and put lines on the graphs to correspond to the circles on the map.
It’s important to note that this is for adults who are 25 and older. While college towns have high numbers of educated residents and that shows up on the graphs, these numbers do not include actual undergraduate students or recent graduates.
Data for 1990 and 2000 comes from the long-form census. Data for 2012 is from the American Community Survey’s 2008-2012 5-year estimates. The census long form survey disappeared after the 2000 census, so questions that would have been on the long form (like education level) are now collected as part of the American Community Survey.