The object of this quiz is to adjust each circle's diameter so it splits the circle's population as evenly as possible. When you click Start you will be shown a marker on a random US census tract (there are over 80K census tracts in the US). Also you will see an circle between 200 and 500 miles radius. Adjust the diameter by rotating it using the endpoints, trying to split the halves into equal populations. Then click submit. You are scored on how close you have split the circle into 50% population in each half. Circle population is tallied by totaling all census tracts (small census areas of average 4K population) within that circle.
NOTE - population in Canada and Mexico is NOT counted at all, only US population within the circle.
I was kinda surprised by what estuarine, bayside, and soundside cities in WA and OR were included or excluded, and yet no such cities in CA were included. For instance, Hoquaim was included, but not Aberdeen. Several Puget Sound municipalities were included, but despite having an actual port that has ocean-going ships taking logs to Asia, Olympia was not. Bainbridge Island, yes. Bremerton, no.
Yeah I went by the boundary files per the directions. Also if a place is unincorporated it’s generally not included on my city quizzes… not sure if that applies to the ones you are thinking of.
I think the San Francisco coordinates are slightly off, it appears to me like its in the water here
That’s actually the centroid of the city as it has a lot of water area…I use a land based coordinate on most quizzes however.