import {legend} from "@d3/color-legend"
simple = require("simple-statistics@7.0.7/dist/simple-statistics.min.js")
format = d => `${d}%`
schooldistricts = FileAttachment("Iowa_School_Districts_2023_2024@1.json").json()
schooldistricts_features = topojson.feature(schooldistricts, schooldistricts.objects.Iowa_School_Districts_2023_2024)
csv_data = d3.csvParse(await FileAttachment("Iowa_School_Districts_2023_2024.csv").text(),({SchoolDist, Pop2020, SqMiles}) => [SchoolDist, [+Pop2020/+SqMiles]])
data = Object.assign(new Map(csv_data), {title: ["Iowa School Districts 2023-2024", "Population Density"]})
data.get("AKRON WESTFIELD")
popdensity = Array.from(csv_data.values(), d => d[1])
YlGnBu = [d3.color("#f1eef6"), d3.color("#d7b5d8"), d3.color("#df65b0"), d3.color("#dd1c77"),d3.color("#980043")]
naturalbreaks = simple.ckmeans(popdensity, YlGnBu.length).map(v => v.pop())
//more information on sequential scales: https://observablehq.com/@d3/sequential-scales
// color = d3.scaleSequentialQuantile([...data.values()], d3.interpolateBlues)
// color = d3.scaleQuantile()
// .domain(med_age)
// .range()
color = d3.scaleThreshold()
.domain(naturalbreaks)
.range(YlGnBu)
width = 975
height = 610
margin = 100
//Using a path generator to project geometry onto the map
path = d3.geoPath().projection(projection);
choropleth = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
svg.append("g")
.attr("transform", "translate(365,20)")
.append(() =>
legend({
color: color,
title: data.title,
width: 260,
tickFormat: ".1f"
})
);
svg.append("g")
.selectAll("path")
.data(schooldistricts_features.features)
.join("path")
.attr("stroke", "white")
.attr("stroke-linejoin", "round")
.attr("stroke-width", 1)
// .attr("fill", function(d){
// console.log(color(data.get(d.properties.SchoolDist)[0]))
// return color(data.get(d.properties.SchoolDist)[0]);
// })
.attr("fill", d => color(data.get(d.properties.SchoolDist)))
.attr("d", path)
.append("title")
.text(d => " Population Density: " + data.get(d.properties.SchoolDist));
return svg.node();
}
data.get("AKRON WESTFIELD")
color(40)
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