25:["$","title",null,{"children":"Du Bois Challenge 2026 Challenge04: Negro Population of Georgia by Counties | XiongBiao | Observable"}] 49:T52e,legend = Plot.plot({ width: 495, height: 618, x: { domain: [0, 495], // 数据坐标范围（与像素对应） range: [0, 495] // 实际绘制范围（通常与 domain 一致，无需显式设置） }, y: { domain: [0, 618], range: [618, 0] // 反转：数据 y=0 对应屏幕顶部（若希望 y 轴向上则 range: [0, 618]） }, axis: null, marks: [ Plot.frame({fill: "#e0cab5"}), Plot.text(["NEGRO POPULATION OF GEORGIA BY COUNTIES."], { frameAnchor: "top", fontSize: 15, fontWeight: "bold", lineHeight: 1.3, dy: 20}), Plot.text(LegendPosition, { x: "x", y: "y", text: (d) => d.Name, fontSize: 10, dx: 18, dy: 0, lineAnchor: "middle", textAnchor: "start"}), Plot.dot(LegendPosition, { fill: (d) => { const value = d.PopMin; if (value === 0) return "#738172"; if (value === 1000) return "#eaba54"; if (value === 2500) return "#dbb5ac"; if (value === 5000) return "#c73f55"; if (value === 10000) return "#c2ad9c"; if (value === 15000) return "#554335"; if (value === 20000) return "#322c5c"; return "#201f1b"; }, stroke: "black", strokeWidth: 0.5, x: "x", y: "y", r: 9 }) ] })4a:[{"id":"0f8f12110827966c5cc5f2e4102d50b0933624d4a422e43e603d4445f6d614e21e2852d22000205cb037b7bddfea32ec37e48b39aebdacb169b5a2bf686a5367","href":"https://static.observableusercontent.com/files/0f8f12110827966c5cc5f2e4102d50b0933624d4a422e43e603d4445f6d614e21e2852d22000205cb037b7bddfea32ec37e48b39aebdacb169b5a2bf686a5367","name":"original-plate-06.jpg","type":"image/jpeg","lastModified":1772156948474.241,"size":246591},{"id":"af235083962cdbd3293ae14b9b27b06c89a7d00ab8cdc1579214773575b19752bd6768305157b1cffb215a6c573e266f45c24d87f80246d4c42dfb5e35825d43","href":"https://static.observableusercontent.com/files/af235083962cdbd3293ae14b9b27b06c89a7d00ab8cdc1579214773575b19752bd6768305157b1cffb215a6c573e266f45c24d87f80246d4c42dfb5e35825d43","name":"Georgia_Negro_Pop_wgs84.geojson","type":"application/geo+json","lastModified":1772156960796.162,"size":19620263}] 29:{"id":"aca12fa34f423c8b","slug":null,"title":"Du Bois Challenge 2026 Challenge04: Negro Population of Georgia by Counties","thumbnail":"763eecfd55bebb90eef276220e6dd2ab9ea07a4e1ca863fda5838bb1fb384b98","access_level":"public","create_time":"$D2026-02-27T01:48:08.183Z","update_time":"$D2026-03-02T12:31:43.468Z","view_time":null,"first_public_time":"$D2026-02-27T01:48:08.183Z","has_unpublished_edits":null,"fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"189a68e88fe366bd","login":"xiongbiao","name":"XiongBiao","avatar_url":"https://avatars-next.observableusercontent.com/a95188709ffcb422fcc635f47420feb25f69fd7305881a42b4a9907e87d2aaf0","tier":"free_2026","bio":"","followed_by_you":false,"follows_you":false},"version":117,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"fc82b550d8112553","login":"xiongbiao","name":"XiongBiao","avatar_url":"https://avatars-next.observableusercontent.com/caf2b8f3d51ea1f56efa20730077b94beb57622ab029080cdb84a9ad89ac467d","tier":null,"bio":"","followed_by_you":false,"follows_you":false}],"members":[{"type":"team","id":"189a68e88fe366bd","login":"xiongbiao","name":"XiongBiao","avatar_url":"https://avatars-next.observableusercontent.com/a95188709ffcb422fcc635f47420feb25f69fd7305881a42b4a9907e87d2aaf0","tier":"free_2026","role":"editor"},{"type":"individual","id":"fc82b550d8112553","login":"xiongbiao","name":"XiongBiao","avatar_url":"https://avatars-next.observableusercontent.com/caf2b8f3d51ea1f56efa20730077b94beb57622ab029080cdb84a9ad89ac467d","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":{"id":"f7022f59988703cc","slug":"duboischallenge2026","title":"DuBoisChallenge2026","owner":{"id":"189a68e88fe366bd","login":"xiongbiao","name":"XiongBiao"}},"type":"notebook","body":{"titling":"auto","title":"Du Bois Challenge 2026 Challenge04: Negro Population of Georgia by Counties","cells":[{"id":0,"value":"# Du Bois Challenge 2026 Challenge04: Negro Population of Georgia by Counties","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":106,"value":"

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