"Isarithmic maps are essentially topographic or contour maps, wherein a third variable is represented in two dimensions by color, or by contour lines, indicating gradations. I had never seen such a map depicting political data — certainly not election returns, and thus sought to create them".
posted by nomadicink
on Nov 22, 2010 -
Ancestry Maps from the 1990 census: Which states have the highest percentage of people of Danish ancestry? Greek? Hispanic? Who (perhaps) doesn't realize that we almost all came here from somewhere else? Using the data provided on 1990 Census question 13, which asked respondents to identify the ancestry groups with which they identified most closely, the State of Minnesota provides us with these nifty Ancestry maps. More info here on 'the ancestry question' from the US Census Bureau. link via ::crabwalk.com::
posted by anastasiav
on Oct 28, 2003 -