Published
Edited
Sep 8, 2020
data = d3.rollup(
d3.csvParse(await FileAttachment("lh_mun_vols.csv").text(), d => ({ ...d, volume: +d.volume })),
v => ({
value: d3.sum(v.map(d => d.volume)),
children: d3.rollup(v, v2 => v2[0].volume, d => d.mun)
}),
d => d.lh
)
height = 600
projection = d3
.geoOrthographic()
.rotate([65, 55, 6])
.center([4, 42])
.scale(1000)
colour = d3.scaleSequential(
d3.extent(data, ([,v]) => v.value),
d => d3.interpolateInferno(1 - d)
)
countries = d3
.json("https://cdn.jsdelivr.net/npm/world-atlas@2/countries-110m.json")
.then(d => topojson.feature(d, d.objects.countries))
brazil = FileAttachment("brazil@1.json")
.json()
.then(d => topojson.feature(d, d.objects.level3))
graticule = d3.geoGraticule10()
// adapted from https://observablehq.com/@d3/color-legend
function drawLegend({
color,
title,
tickSize = 6,
width = 320,
height = 44 + tickSize,
marginTop = 18,
marginRight = 20,
marginBottom = 16 + tickSize,
marginLeft = 0,
ticks = width / 64,
tickFormat,
tickValues
} = {}) {
const svg = d3
.create("svg")
.attr("width", width)
.attr("height", height)
.attr("viewBox", [0, 0, width, height])
.style("overflow", "hidden")
.style("display", "block");
// scale
const x = Object.assign(
color
.copy()
.interpolator(d3.interpolateRound(marginLeft, width - marginRight)),
{
range() {
return [marginLeft, width - marginRight];
}
}
);
// ramp
svg
.append("image")
.attr("x", marginLeft)
.attr("y", marginTop)
.attr("width", width - marginLeft - marginRight)
.attr("height", height - marginTop - marginBottom)
.attr("preserveAspectRatio", "none")
.attr("xlink:href", ramp(color.interpolator()).toDataURL());
// axis
const axis = d3
.axisBottom(x)
.ticks(ticks, typeof tickFormat === "string" ? tickFormat : undefined)
.tickFormat(typeof tickFormat === "function" ? tickFormat : undefined)
.tickSize(tickSize)
.tickValues(tickValues);
// ticks
const g = svg
.append("g")
.attr("transform", `translate(0, ${height - marginBottom})`)
.style("font-family", "sans-serif")
.call(axis)
.call(g =>
g.selectAll(".tick line").attr("y1", marginTop + marginBottom - height)
)
.call(g =>
g
.select(".domain")
.attr("stroke-width", 0)
.remove()
)
.call(g =>
g
.append("text")
.attr("y", marginTop + marginBottom - height - 6)
.attr("fill", "currentColor")
.attr("text-anchor", "start")
.attr("font-weight", "bold")
.text(title)
);
// update
return Object.assign(svg.node(), {
update(domain) {
x.domain(domain);
g.transition()
.duration(500)
.call(axis)
.call(g =>
g
.selectAll(".tick line")
.attr("y1", marginTop + marginBottom - height)
)
.call(g =>
g
.select(".domain")
.attr("stroke-width", 0)
.remove()
);
}
});
}
d3 = require("d3@6")
topojson = require("topojson-client@3")
import { ramp } from "@d3/color-legend"
// lh_mun_vols = DatabaseClient("trase-master").then(client =>
// client.query(
// `
// SELECT SUBSTRING(logistics_hub_trase_id, 4, 9) as lh,
// SUBSTRING(region_production_1_trase_id, 4, 9) as mun,
// SUM(volume) as volume
// FROM views.datasets
// WHERE country_of_production = 'BRAZIL'
// AND commodity = 'SOY'
// AND year = 2017
// GROUP BY lh, mun
// `
// )
// )
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