md`# Assignment 1 - California Native Pop.`
states = FileAttachment("GEOG3540_Assignment_1_California.json").json()
states_features = topojson.feature(states, states.objects.GEOG3540_Assignment_1_California)
csv_data = d3.csvParse(await FileAttachment("GEOG3540_Assignment_1_California_Census.csv").text(),({COUNTYFP10, Native, Total}) => [COUNTYFP10, [+Native/+Total]])
//this is how to take the values of a variable (column) from all variables you created from the csv file
nativepct = Array.from(csv_data.values(), d => d[1][0])
//this is how you map the id column to the values. We will use this for joining with topojson later.
data = Object.assign(new Map(csv_data), {title: ["Native Population in California"]})
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