2b:null 2c:["$","title",null,{"children":"South African Power Generation | Jesse Johnson's Workspace | Observable"}] 31:T68f,powerGeneration = Plot.plot({ width: 900, title: "Electricity Production in South African", caption: "Energy production in South Africa. A red spike shows production Megawatts. Select production types to show with checkboxes.", style: { backgroundColor: "slategray", color: "#ffffff" }, color: { range: color_map.values() }, projection: { type: "mercator", domain: provinces_za }, marks: [ Plot.geo(provinces_za, { fill: "lightgrey", stroke: "gray", strokeWidth: 0.5 }), Plot.dot(major_cities, { x: "Longitude", y: "Latitude", r: 1, fill: "black" }), Plot.text(major_cities, { x: "Longitude", y: "Latitude", dy: 10, text: (d) => d.AccentCity, fontSize: 14, fill: "black" }), Plot.dot(southafricapowergeneration, { filter: (d) => genTypes.includes(d.Type), x: "Longitude", y: "Latitude", r: 5, stroke: "Type" }), // Lets try a 'spike map' Plot.spike( southafricapowergeneration, { filter: (d) => genTypes.includes(d.Type), x: "Longitude", y: "Latitude", stroke: "red", length: "TotalCapacityMW" }, Plot.centroid() ), legendSpike([100, 200, 500, 1000, 2000, 4000], { stroke: "red" }), Plot.tip( southafricapowergeneration, Plot.pointer({ filter: (d) => genTypes.includes(d.Type), x: "Longitude", y: "Latitude", title: (d) => [d["Power plant"], `${d["TotalCapacityMW"]} megawatts`].join("\n"), fill: "black", fontSize: 12 }) ) ] 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2f:{"id":"c9fe2878300fcc6c","slug":null,"title":"South African Power Generation","thumbnail":"7387eac447b33bd888d4831a3858d18657484d234bd49b2ca8d19999e1b05253","access_level":"public","create_time":"$D2024-02-07T16:54:58.956Z","update_time":"$D2025-09-17T20:03:32.359Z","view_time":null,"first_public_time":"$D2024-02-07T16:54:58.956Z","has_unpublished_edits":null,"fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"518a19f15bc65c30","login":"jesse-johnson-ws","name":"Jesse Johnson's Workspace","avatar_url":"https://avatars-next.observableusercontent.com/5f664e52e040271f29fdaa246480cfd9c714e2aec9109302c80d5b2af6ee0522","tier":"starter_2024"},"version":429,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"42197f0a73bea471","login":"jesse-johnson","name":"Jesse Johnson","avatar_url":"https://avatars-next.observableusercontent.com/6f77e9c8107552cefa56453d3df0976b842aada524da3b86481abc7e409fd3ac","tier":null}],"members":[{"type":"individual","id":"42197f0a73bea471","login":"jesse-johnson","name":"Jesse Johnson","avatar_url":"https://avatars-next.observableusercontent.com/6f77e9c8107552cefa56453d3df0976b842aada524da3b86481abc7e409fd3ac","tier":null,"role":"editor"},{"type":"team","id":"518a19f15bc65c30","login":"jesse-johnson-ws","name":"Jesse Johnson's Workspace","avatar_url":"https://avatars-next.observableusercontent.com/5f664e52e040271f29fdaa246480cfd9c714e2aec9109302c80d5b2af6ee0522","tier":"starter_2024","role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":5,"collection":null,"type":"notebook","body":{"title":"South African Power Generation","cells":[{"id":0,"value":"# South African Power Generation\nThis visualization was prepared as an extension of the [visualization](https://observablehq.com/d/e4faeb0a19c7f9dd) detailing the so-called \"load shedding\" or planned power outages experienced in South Africa. Here, I look at what appears to be a diverse range of power sources, but explore the hypothesis that:\n\n***South Africa is highly dependent on coal for electricity production, and the coal supply all comes from a single region.***\n\nWhile this visualization doesn't explore it, my understanding is that roads, rail, labor, and plant maintenance all can make coal undependable. Then again, what is dependable?","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":321,"value":"html`\n \n \n \n \n

${powerGeneration}

${barProgress}

`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":99,"value":"viewof genTypes = Inputs.checkbox(color_map, {\n value: [\"Coal\"],\n label: html`Generation Type`,\n format: ([type, color]) =>\n html`${type}`,\n valueof: ([key, value]) => key\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":5,"value":"$31","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":298,"value":"## Proportion of power supply, by production method\nWhile the above map gives a good sense of the geographic distribution of various power sources, and an intuitive feel for proportions, more is needed in terms of how big a share each form of production provides. Here is a first attempt. Placing this bar to the right of the map might be the most complete way to present this all.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":239,"value":"barProgress = Plot.plot({\n width: 120,\n caption: \"Bar shows total energy production of selected types.\",\n x: { label: null },\n y: { tickFormat: \"s\", tickSpacing: 50 },\n marks: [\n Plot.barY(\n southafricapowergeneration,\n Plot.groupX(\n {\n y: \"sum\"\n },\n {\n x: \"\",\n y: \"TotalCapacityMW\",\n filter: (d) => genTypes.includes(d.Type),\n fill: \"Type\",\n order: \"sum\",\n fill: (d) => color_map.get(d.Type)\n }\n )\n )\n ]\n})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":406,"value":"color_map.values(genTypes.values())","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":111,"value":"color_map = new Map([[\"Biogas\", \"brown\"],[\"Coal\",\"black\"],[\"Concentrated Solar\",\"gold\"],\n[\"Gas Turbine\",\"lightblue\"],[\"Hydro\",\"blue\"],[\"Landfill Gas\",\"olive\"],[\"Nuclear\",\"coral\"],[\"Pumped Storage\",\"seagreen\"],[\"Solar Photovoltaic\",\"yellow\"],[\"Wind\",\"cornsilk\"]])","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":8,"value":"za = FileAttachment(\"za-provinces.topojson\").json()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":10,"value":"provinces_za = topojson.feature(za,za.objects.layer1)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":14,"value":"major_cities = FileAttachment(\"major_cities.json\").json()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":46,"value":"function legendSpike(\n values,\n { frameAnchor = \"bottom-right\", format = \"~s\", stroke } = {}\n) {\n if (!Array.isArray(values)) values = Array.from(values);\n if (typeof format !== \"function\") format = d3.format(format);\n return Plot.marks(\n values.map((v, i) => {\n const dx = (i - values.length) * 18;\n return [\n Plot.spike([v], {\n length: [v],\n dx,\n dy: -20,\n frameAnchor,\n stroke\n }),\n Plot.text([v], {\n text: [format(v)],\n dx,\n dy: -10,\n frameAnchor,\n textAnchor: \"middle\",\n fill: \"black\"\n })\n ];\n })\n );\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":95,"value":"southafricapowergeneration = await FileAttachment(\"SouthAfricaPowerGeneration@4.csv\").csv({typed: \"auto\"})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"southafricapowergeneration","database":"$undefined"}],"files":"$W32","stdlib":"1","titling":"auto"}} 30:"$2f:body"