21:null 22:["$","title",null,{"children":"Antarctic Facilities By Operator And Territorial Claim, May 2024 | North Branch Media | Observable"}] 27:T6060,(async () => { const d3 = await import("https://cdn.jsdelivr.net/npm/d3@7/+esm"); const topojson = await import("https://cdn.jsdelivr.net/npm/topojson-client@3/+esm"); // Tokens const BLUE = "#043463"; const RED = "#fe0100"; const GREY = "#c9c9c9"; const PINK = "#ff8088"; const WHITE = "#ffffff"; const FONT = "-apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif"; const EPOCH = "May 2024"; // Data // https://github.com/PolarGeospatialCenter/comnap-antarctic-facilities const RAW = [["Belgrano II Antartic Base","Argentina","Station",1,1,1979,-77.87,-34.63],["Brown Antartic Base","Argentina","Station",0,0,1951,-64.9,-62.87],["Cámara Antartic Base","Argentina","Station",0,1,1953,-62.59,-59.92],["Carlini Antartic Base","Argentina","Station",1,1,1953,-62.24,-58.67],["Decepcion Antartic Base","Argentina","Station",0,1,1948,-62.98,-60.7],["Esperanza Antartic Base","Argentina","Station",1,1,1952,-63.4,-57.0],["Marambio Antartic Base","Argentina","Station",1,1,1969,-64.24,-56.62],["Matienzo Antartic Base","Argentina","Station",0,1,1961,-64.98,-60.07],["Melchior Antartic Base","Argentina","Station",0,0,1947,-64.33,-62.98],["Orcadas Antartic Base","Argentina","Station",1,1,1904,-60.74,-44.74],["Petrel Antartic Base","Argentina","Station",1,1,1952,-63.48,-56.23],["Primavera Antartic Base","Argentina","Station",0,1,1977,-64.16,-60.95],["San Martin Antartic Base","Argentina","Station",1,1,1951,-68.13,-67.1],["Casey","Australia","Station",1,1,1969,-66.28,110.53],["Davis","Australia","Station",1,1,1957,-68.58,77.97],["Edgeworth David","Australia","Camp",0,1,null,-66.25,100.6],["Law","Australia","Refuge",0,1,null,-69.39,76.38],["Mawson","Australia","Station",1,1,1954,-67.6,62.87],["Wilkins Aerodrome","Australia","Airfield Camp",0,1,2003,-66.69,111.49],["Princess Elisabeth Antarctica","Belgium","Station",0,1,2008,-71.95,23.35],["Goeldi","Brazil","Refuge",0,1,1988,-61.13,-55.35],["Comandante Ferraz","Brazil","Station",1,1,1984,-62.09,-58.4],["Criosfera 1","Brazil","Laboratory",0,1,2012,-84.0,-79.5],["Criosfera 2","Brazil","Laboratory",0,1,null,-79.7,78.68],["Cruls","Brazil","Refuge",0,1,null,-62.25,-58.98],["St. Kliment Ohridski","Bulgaria","Station",0,1,1988,-62.64,-60.37],["Arturo Prat Antarctic Naval Base","Chile","Station",1,1,1947,-62.48,-59.66],["Bahía Fildes Maritime Station","Chile","Station",1,1,null,-62.2,-58.96],["Carvajal","Chile","Station",0,0,1985,-67.76,-68.91],["Dr. Guillermo Mann","Chile","Refuge",0,1,1991,-62.47,-60.77],["Estacion Polar Cientifica Conjunta Glaciar Union","Chile","Camp",0,1,null,-79.77,-82.92],["Gabriel Gonzalez Videla","Chile","Station",0,1,1951,-64.82,-62.86],["Lieutenant Rodolfo Marsh Martin Aerodrome","Chile","Airfield Camp",1,1,1980,-62.19,-58.98],["O'Higgins Base","Chile","Station",1,1,1948,-63.32,-57.9],["President Eduardo Frei Antarctic Base","Chile","Station",1,1,1969,-62.2,-58.96],["Professor Julio Escudero","Chile","Station",0,1,1995,-62.2,-58.96],["Rada Covadonga","Chile","Station",0,1,null,-63.32,-57.9],["Ripamonti","Chile","Refuge",0,1,null,-62.21,-58.93],["Risopatron","Chile","Station",0,1,1949,-62.38,-59.7],["Yelcho","Chile","Station",0,1,1962,-64.88,-63.58],["Great Wall","China","Station",1,1,1985,-62.22,-58.96],["Kunlun","China","Station",0,1,2009,-80.42,77.12],["QinLing","China","Station",1,1,2024,-74.93,163.71],["Taishan","China","Camp",0,1,2014,-73.85,76.97],["Zhongshan","China","Station",1,1,1989,-69.37,76.37],["Zhongshan Skiway","China","Airfield Camp",0,1,2022,-69.62,76.49],["Johann Gregor Mendel Czech Antarctic Station","Czech Republic","Station",0,1,2006,-63.8,-57.88],["Pedro Vicente Maldonado","Ecuador","Station",0,1,1990,-62.45,-59.74],["Republica del Ecuador","Ecuador","Refuge",0,1,1990,-62.12,-58.4],["Aboa","Finland","Station",0,0,1988,-73.04,-13.41],["D85 Skiway camp","France","Airfield Camp",0,1,null,-70.42,134.15],["Dumont d'Urville","France","Station",1,1,1956,-66.66,140.0],["Robert Guillard","France","Station",0,1,1994,-66.69,139.91],["German Antarctic Receiving Station (GARS)","Germany","Station",1,1,1991,-63.32,-57.9],["Gondwana","Germany","Station",0,1,1983,-74.64,164.22],["Kohnen","Germany","Station",0,1,2000,-75.0,0.07],["Neumayer III","Germany","Station",1,1,2009,-70.66,-8.28],["Bharati","India","Station",1,1,2012,-69.41,76.2],["Maitri","India","Station",1,1,1989,-70.77,11.73],["Browning Pass","Italy","Airfield Camp",0,1,1997,-74.62,163.92],["Concordia","Italy","Station",1,1,1997,-75.1,123.33],["Enigma Lake","Italy","Airfield Camp",0,1,2005,-74.72,164.03],["Mario Zucchelli","Italy","Station",0,1,1986,-74.69,164.11],["Mid Point","Italy","Airfield Camp",0,1,1988,-75.54,145.82],["Talos Dome","Italy","Camp",0,1,null,-72.83,159.2],["Asuka","Japan","Station",0,0,1985,-71.53,24.11],["Dome Fuji","Japan","Station",0,0,1995,-77.32,39.7],["Mizuho","Japan","Station",0,0,1970,-70.7,44.28],["S17 Camp","Japan","Camp",0,1,null,-69.03,40.09],["Syowa","Japan","Station",1,1,1957,-69.0,39.58],["Dirck Gerritsz Laboratory","Netherlands","Laboratory",0,1,2012,-67.57,-68.12],["Scott Base","New Zealand","Station",1,1,1957,-77.85,166.77],["Tor","Norway","Refuge",0,1,1993,-71.89,5.16],["Troll Station","Norway","Station",1,1,1990,-72.01,2.53],["Machu Picchu","Peru","Station",0,1,1989,-62.09,-58.47],["Henryk Arctowski","Poland","Station",1,1,1977,-62.16,-58.47],["Mountain Evening","Republic of Belarus","Station",0,1,2006,-67.66,46.15],["Jang Bogo","Republic of Korea","Station",1,1,2014,-74.62,164.2],["King Sejong","Republic of Korea","Station",1,1,1988,-62.22,-58.78],["Bellingshausen","Russia","Station",1,1,1968,-62.2,-58.96],["Bunger Oasis","Russia","Station",0,1,null,-66.27,100.73],["Druzhnaya IV","Russia","Station",0,1,null,-69.75,73.71],["Leningradskaya","Russia","Station",0,1,1971,-69.5,159.39],["Mirny","Russia","Station",1,1,1956,-66.55,93.01],["Molodezhnaya","Russia","Station",0,1,1963,-67.67,45.84],["Novolazarevskaya","Russia","Station",1,1,1961,-70.78,11.83],["Progress","Russia","Station",1,1,1989,-69.38,76.39],["Russkaya","Russia","Station",0,1,1980,-74.77,-136.8],["Soyuz","Russia","Station",0,0,1982,-70.58,68.79],["Vostok","Russia","Station",1,1,1957,-78.46,106.84],["SANAE IV","South Africa","Station",1,1,1962,-71.67,-2.84],["SANAP Summer Station","South Africa","Station",0,1,2010,-70.65,-8.25],["Gabriel de Castilla Station","Spain","Station",0,1,1990,-62.98,-60.68],["International Field Camp Peninsula Byers","Spain","Camp",0,1,2001,-62.66,-61.1],["Juan Carlos I","Spain","Station",0,1,1988,-62.66,-60.39],["Svea","Sweden","Refuge",0,0,null,-74.58,-11.22],["Wasa","Sweden","Station",0,0,1989,-73.04,-13.41],["Turkish Scientific Research Camp","Türkiye","Camp",0,1,2019,-67.83,-67.24],["Vernadsky","Ukraine","Station",1,1,1996,-65.25,-64.26],["Fossil Bluff","United Kingdom","Depot",0,1,1961,-71.32,-68.29],["Halley VI","United Kingdom","Station",0,1,1956,-75.57,-25.47],["Rothera","United Kingdom","Station",1,1,1975,-67.57,-68.12],["Signy","United Kingdom","Station",0,1,1947,-60.71,-45.6],["Sky Blu","United Kingdom","Depot",0,1,null,-74.86,-71.59],["Amundsen-Scott South Pole","United States","Station",1,1,1957,-89.98,142.27],["Byrd Surface","United States","Camp",0,0,null,-80.01,-119.56],["Marble Point Refueling Facility","United States","Depot",0,1,null,-77.43,163.83],["McMurdo","United States","Station",1,1,1956,-77.85,166.67],["Palmer","United States","Station",1,1,1965,-64.77,-64.05],["Siple Dome","United States","Camp",0,1,1973,-81.67,-149.02],["WAIS Divide","United States","Camp",0,1,2005,-79.48,-112.08],["Artigas","Uruguay","Station",1,1,1984,-62.18,-58.9],["Ruperto Elichiribehety","Uruguay","Station",0,1,1997,-63.4,-56.99]]; const CLAIMS = [ { name: "Argentina", ranges: [[-74, -25]] }, { name: "Chile", ranges: [[-90, -53]] }, { name: "United Kingdom", ranges: [[-80, -20]] }, { name: "Norway", ranges: [[-20, 44.633333]] }, { name: "Australia", ranges: [[44.633333, 136.183333], [142.033333, 160]] }, { name: "France", ranges: [[136.183333, 142.033333]] }, { name: "New Zealand", ranges: [[160, 210]] } ]; const CLAIMANTS = new Set(CLAIMS.map(c => c.name)); const inRange = (lon, r) => { const l = lon < r[0] ? lon + 360 : lon; return l >= r[0] && l <= r[1]; }; const facilities = RAW.map(r => { const f = { name: r[0], op: r[1], type: r[2], yr: r[3] === 1, open: r[4] === 1, est: r[5], lat: r[6], lon: r[7] }; f.pole = f.lat < -89.9; f.claims = f.pole ? [] : CLAIMS.filter(c => c.ranges.some(rg => inRange(f.lon, rg))).map(c => c.name); f.claimant = CLAIMANTS.has(f.op); return f; }); // Root const W = 1000; const root = document.createElement("div"); root.style.cssText = "width:" + W + "px;box-sizing:border-box;padding:24px;background:" + WHITE + ";font-family:" + FONT + ";color:" + BLUE + ";position:relative;display:flex;flex-direction:column;gap:10px;"; // Titles const title = document.createElement("div"); title.textContent = "Antarctic Facilities By Operator And Territorial Claim, " + EPOCH; title.style.cssText = "margin:0;font-family:Georgia, 'Times New Roman', serif;font-weight:700;font-size:30px;line-height:1.15;color:" + BLUE + ";"; root.appendChild(title); const subtitle = document.createElement("div"); subtitle.textContent = facilities.length + " COMNAP-listed structures south of 60°S, open or temporarily closed, as of " + EPOCH + ", by primary operator. Sectors are the seven official territorial claims."; subtitle.style.cssText = "margin:0;font-size:14.5px;line-height:1.4;color:" + RED + ";"; root.appendChild(subtitle); // Legend const legend = document.createElement("div"); legend.style.cssText = "margin:0;display:flex;flex-wrap:wrap;gap:6px 18px;font-size:12.5px;color:" + BLUE + ";"; const swatch = (fill, stroke, label) => { const s = document.createElement("span"); s.style.cssText = "display:inline-flex;align-items:center;gap:6px;"; const dot = document.createElement("span"); dot.style.cssText = "display:inline-block;width:10px;height:10px;border-radius:50%;box-sizing:border-box;background:" + fill + ";border:2px solid " + stroke + ";"; s.appendChild(dot); s.appendChild(document.createTextNode(label)); legend.appendChild(s); }; swatch(BLUE, BLUE, "Claimant state (bars: that sector's claimant)"); swatch(PINK, PINK, "Bars: another claimant state"); swatch(RED, RED, "Non-claimant state"); swatch(BLUE, BLUE, "Year-round"); swatch(WHITE, BLUE, "Seasonal"); root.appendChild(legend); // Body const body = document.createElement("div"); body.style.cssText = "margin:0;display:flex;gap:16px;align-items:flex-start;"; root.appendChild(body); // Tooltip const tip = document.createElement("div"); tip.style.cssText = "position:absolute;pointer-events:none;background:" + WHITE + ";border:1px solid " + GREY + ";padding:6px 8px;font-size:12px;line-height:1.35;color:" + BLUE + ";display:none;max-width:240px;z-index:2;"; root.appendChild(tip); const facLines = f => [ f.name, f.op + (f.claimant ? " (claimant state)" : " (non-claimant state)"), f.type + ", " + (f.yr ? "Year-round" : "Seasonal") + (f.open ? "" : ", temporarily closed"), f.est ? "Established " + f.est : "Established year not listed", "Claim sector: " + (f.pole ? "South Pole" : (f.claims.length ? f.claims.join(", ") : "Unclaimed sector")), "As of " + EPOCH ]; const showTip = (event, lines) => { tip.innerHTML = ""; lines.forEach((t, i) => { const l = document.createElement("div"); l.textContent = t; if (i === 0) l.style.color = RED; tip.appendChild(l); }); const rb = root.getBoundingClientRect(); const x = event.clientX - rb.left; const y = event.clientY - rb.top; tip.style.display = "block"; const tw = tip.offsetWidth; tip.style.left = (x + 14 + tw > W ? x - 14 - tw : x + 14) + "px"; tip.style.top = (y + 12) + "px"; }; const hideTip = () => { tip.style.display = "none"; }; // Basemap const landAll = topojson.feature(await (await fetch("https://cdn.jsdelivr.net/npm/world-atlas@2/land-10m.json")).json(), "land"); const land = { type: "MultiPolygon", coordinates: (landAll.type === "FeatureCollection" ? landAll.features.map(f => f.geometry) : [landAll.geometry]) .flatMap(g => (g.type === "Polygon" ? [g.coordinates] : g.coordinates)) .filter(p => d3.min(p[0], c => c[1]) < -55 && d3.geoArea({ type: "Polygon", coordinates: p }) < 2 * Math.PI) }; // Projection const MAP = 600; const C = MAP / 2; const R60 = 232; const proj = d3.geoAzimuthalEqualArea().rotate([0, 90, 180]).clipAngle(30); const k60 = Math.hypot(...proj.scale(1).translate([0, 0])([0, -60])); proj.scale(R60 / k60).translate([C, C]); const path = d3.geoPath(proj); const ang = lon => { const p = proj([lon, -61]); return Math.atan2(p[0] - C, -(p[1] - C)); }; const sweep = Math.sign(((ang(1) - ang(0) + 3 * Math.PI) % (2 * Math.PI)) - Math.PI); const arcAngles = (l1, l2) => { let a1 = ang(l1); let a2 = ang(l2); if (sweep < 0) [a1, a2] = [a2, a1]; while (a2 <= a1) a2 += 2 * Math.PI; return [a1, a2]; }; const sectorPolygon = (l1, l2) => { const ring = []; for (let l = l1; l <= l2; l += 1) ring.push([l, -60]); ring.push([l2, -60], [l2, -89.999], [l1, -89.999], [l1, -60]); const poly = { type: "Polygon", coordinates: [ring] }; return d3.geoArea(poly) > 2 * Math.PI ? { type: "Polygon", coordinates: [ring.slice().reverse()] } : poly; }; // Map const svg = d3.create("svg").attr("width", MAP).attr("height", MAP).attr("viewBox", [0, 0, MAP, MAP]).style("display", "block").style("overflow", "visible"); body.appendChild(svg.node()); svg.append("circle").attr("cx", C).attr("cy", C).attr("r", R60).attr("fill", WHITE).attr("stroke", BLUE).attr("stroke-width", 0.8).attr("pointer-events", "none"); svg.append("path").attr("d", path({ type: "MultiLineString", coordinates: [-70, -80].map(lat => d3.range(-180, 181, 2).map(lon => [lon, lat])) })).attr("fill", "none").attr("stroke", BLUE).attr("stroke-opacity", 0.12).attr("stroke-width", 0.4).attr("pointer-events", "none"); // Sectors const sectors = svg.append("g").attr("pointer-events", "none"); CLAIMS.forEach(c => c.ranges.forEach(r => { sectors.append("path").attr("d", path(sectorPolygon(r[0], r[1]))).attr("fill", BLUE).attr("fill-opacity", 0.09).attr("stroke", "none"); })); // Land svg.append("path").attr("d", path(land)).attr("fill", GREY).attr("stroke", WHITE).attr("stroke-width", 0.4).attr("pointer-events", "none"); // Limits [-150, -90, -80, -74, -53, -25, -20, 44.633333, 136.183333, 142.033333, 160].forEach(l => { svg.append("path").attr("d", path({ type: "LineString", coordinates: [[l, -60], [l, -89.999]] })).attr("fill", "none").attr("stroke", BLUE).attr("stroke-width", 0.7).attr("stroke-dasharray", "3 3").attr("pointer-events", "none"); }); // Tracks const TRACK = [{ r0: 240, r1: 255 }, { r0: 258, r1: 273 }, { r0: 276, r1: 291 }]; const trackOf = { Chile: 0, Norway: 0, France: 0, "New Zealand": 0, "United Kingdom": 1, Australia: 1, Argentina: 2 }; const tracks = svg.append("g").attr("pointer-events", "none"); const arcLabel = (text, a1, a2, rm, col) => { const mid = (a1 + a2) / 2; const m = ((mid % (2 * Math.PI)) + 2 * Math.PI) % (2 * Math.PI); const rot = m * 180 / Math.PI + (m > Math.PI / 2 && m < 3 * Math.PI / 2 ? 180 : 0); tracks.append("text").attr("transform", "translate(" + (C + rm * Math.sin(mid)) + "," + (C - rm * Math.cos(mid)) + ") rotate(" + rot + ")") .attr("font-size", 10.5).attr("fill", col).attr("text-anchor", "middle").attr("dominant-baseline", "central").text(text); }; CLAIMS.forEach(c => { const t = TRACK[trackOf[c.name]]; const spans = c.ranges.map(r => arcAngles(r[0], r[1])); spans.forEach(s => { tracks.append("path").attr("transform", "translate(" + C + "," + C + ")").attr("d", d3.arc()({ innerRadius: t.r0, outerRadius: t.r1, startAngle: s[0], endAngle: s[1] })).attr("fill", BLUE); }); const best = spans.reduce((a, b) => (b[1] - b[0] > a[1] - a[0] ? b : a)); const rm = (t.r0 + t.r1) / 2; if ((best[1] - best[0]) * rm >= c.name.length * 6.2 + 12) { arcLabel(c.name, best[0], best[1], rm, WHITE); } else { const mid = (best[0] + best[1]) / 2; const pt = r => [C + r * Math.sin(mid), C - r * Math.cos(mid)]; const a = pt(t.r1); const b = pt(TRACK[2].r1 + 4); tracks.append("line").attr("x1", a[0]).attr("y1", a[1]).attr("x2", b[0]).attr("y2", b[1]).attr("stroke", BLUE).attr("stroke-width", 0.8); tracks.append("text").attr("x", b[0] + (Math.sin(mid) < 0 ? -3 : 3)).attr("y", b[1] - 3).attr("font-size", 10.5).attr("fill", BLUE) .attr("text-anchor", Math.sin(mid) < 0 ? "end" : "start").attr("dominant-baseline", "central").text(c.name); } }); const un = arcAngles(-150, -90); arcLabel("Unclaimed sector", un[0], un[1], (TRACK[0].r0 + TRACK[0].r1) / 2, RED); // Inset frame const BOX = [[-69.5, -68.7], [-54.5, -60.7]]; const inBox = f => f.lon >= BOX[0][0] && f.lon <= BOX[1][0] && f.lat >= BOX[0][1] && f.lat <= BOX[1][1]; const boxRing = []; for (let l = BOX[0][0]; l <= BOX[1][0]; l += 0.5) boxRing.push([l, BOX[0][1]]); for (let l = BOX[1][0]; l >= BOX[0][0]; l -= 0.5) boxRing.push([l, BOX[1][1]]); boxRing.push(boxRing[0]); svg.append("path").attr("d", path({ type: "LineString", coordinates: boxRing })).attr("fill", "none").attr("stroke", RED).attr("stroke-width", 1).attr("pointer-events", "none"); const boxPts = boxRing.map(p => proj(p)); svg.append("text").attr("x", d3.mean(boxPts, p => p[0])).attr("y", d3.mean(boxPts, p => p[1])).attr("font-size", 10.5).attr("fill", RED).attr("text-anchor", "middle").attr("dominant-baseline", "central").attr("pointer-events", "none").text("Inset"); // Dodge const dodge = (pts, r) => { const nodes = pts.map(p => ({ f: p.f, x0: p.x, y0: p.y, x: p.x, y: p.y })); d3.forceSimulation(nodes).randomSource(d3.randomLcg(42)) .force("x", d3.forceX(d => d.x0).strength(0.25)) .force("y", d3.forceY(d => d.y0).strength(0.25)) .force("c", d3.forceCollide(r + 0.6).iterations(4)) .stop().tick(320); return nodes; }; const drawDots = (g, nodes, r) => { g.append("g").attr("pointer-events", "none").selectAll("line").data(nodes.filter(n => Math.hypot(n.x - n.x0, n.y - n.y0) > r)).join("line") .attr("x1", d => d.x0).attr("y1", d => d.y0).attr("x2", d => d.x).attr("y2", d => d.y) .attr("stroke", BLUE).attr("stroke-opacity", 0.55).attr("stroke-width", 0.6); g.append("g").selectAll("circle").data(nodes).join("circle") .attr("cx", d => d.x).attr("cy", d => d.y).attr("r", r) .attr("fill", d => (d.f.yr ? (d.f.claimant ? BLUE : RED) : WHITE)) .attr("stroke", d => (d.f.claimant ? BLUE : RED)).attr("stroke-width", 1.5) .style("cursor", "default") .on("mousemove", (e, d) => showTip(e, facLines(d.f))).on("mouseleave", hideTip); }; const mainNodes = dodge(facilities.filter(f => !inBox(f)).map(f => { const p = proj([f.lon, f.lat]); return { f, x: p[0], y: p[1] }; }), 3.4); drawDots(svg.append("g"), mainNodes, 3.4); // Labels const poleNode = mainNodes.find(n => n.f.pole); svg.append("text").attr("x", poleNode.x + 14).attr("y", poleNode.y - 12).attr("font-size", 12).attr("font-weight", 700).attr("fill", WHITE) .attr("stroke", BLUE).attr("stroke-width", 2.4).attr("paint-order", "stroke").attr("dominant-baseline", "central").attr("pointer-events", "none") .text("Amundsen-Scott South Pole"); // Right const right = document.createElement("div"); right.style.cssText = "margin:0;width:336px;display:flex;flex-direction:column;gap:12px;"; body.appendChild(right); // Inset const IW = 336; const IH = 286; const iproj = d3.geoAzimuthalEqualArea().rotate([62, 64.7]); const boxGeo = { type: "Polygon", coordinates: [boxRing.slice().reverse()] }; iproj.fitExtent([[6, 22], [IW - 6, IH - 6]], d3.geoArea(boxGeo) > 2 * Math.PI ? { type: "Polygon", coordinates: [boxRing] } : boxGeo); iproj.clipExtent([[0, 0], [IW, IH]]); const ipath = d3.geoPath(iproj); const isvg = d3.create("svg").attr("width", IW).attr("height", IH).attr("viewBox", [0, 0, IW, IH]).style("display", "block"); right.appendChild(isvg.node()); isvg.append("rect").attr("width", IW).attr("height", IH).attr("fill", WHITE).attr("stroke", RED).attr("stroke-width", 1); isvg.append("path").attr("d", ipath(land)).attr("fill", GREY).attr("stroke", WHITE).attr("stroke-width", 0.4).attr("pointer-events", "none"); [-74, -53].forEach(l => { isvg.append("path").attr("d", ipath({ type: "LineString", coordinates: [[l, -60], [l, -70]] })).attr("fill", "none").attr("stroke", BLUE).attr("stroke-width", 0.7).attr("stroke-dasharray", "3 3").attr("pointer-events", "none"); }); const insetNodes = dodge(facilities.filter(inBox).map(f => { const p = iproj([f.lon, f.lat]); return { f, x: p[0], y: p[1] }; }), 3.4); drawDots(isvg.append("g"), insetNodes, 3.4); isvg.append("text").attr("x", 10).attr("y", 15).attr("font-size", 11.5).attr("fill", BLUE).attr("pointer-events", "none").text("Inset: Antarctic Peninsula, " + insetNodes.length + " facilities"); [[-74, -67.6, "74\u00b0W", "start", 4], [-53, -61.6, "53\u00b0W", "end", -4]].forEach(([lon, lat, txt, anchor, dx]) => { const p = iproj([lon, lat]); isvg.append("text").attr("x", p[0] + dx).attr("y", p[1]).attr("font-size", 10).attr("fill", BLUE).attr("text-anchor", anchor).attr("pointer-events", "none").text(txt); }); isvg.append("text").attr("x", 150).attr("y", IH - 10).attr("font-size", 10.5).attr("fill", BLUE).attr("text-anchor", "middle").attr("pointer-events", "none").attr("stroke", WHITE).attr("stroke-width", 3).attr("paint-order", "stroke").text("Argentina, Chile and UK claims overlap"); // Bars const rows = CLAIMS.map(c => { const inn = facilities.filter(f => f.claims.includes(c.name)); return { name: c.name, own: inn.filter(f => f.op === c.name).length, other: inn.filter(f => f.op !== c.name && f.claimant).length, non: inn.filter(f => !f.claimant).length }; }); rows.push({ name: "Unclaimed sector", own: 0, other: 0, non: facilities.filter(f => !f.pole && !f.claims.length).length }); rows.push({ name: "South Pole", own: 0, other: 0, non: facilities.filter(f => f.pole).length }); const BW = 336; const LABW = 112; const ROWH = 22; const BTOP = 30; const BH = BTOP + rows.length * ROWH + 18; const x = d3.scaleLinear().domain([0, d3.max(rows, r => r.own + r.other + r.non)]).range([0, BW - LABW - 30]); const bsvg = d3.create("svg").attr("width", BW).attr("height", BH).attr("viewBox", [0, 0, BW, BH]).style("display", "block"); right.appendChild(bsvg.node()); bsvg.append("text").attr("x", 0).attr("y", 11).attr("font-size", 12).attr("fill", BLUE).text("Facilities per claim sector, as of " + EPOCH); rows.forEach((r, i) => { const y = BTOP + i * ROWH; bsvg.append("text").attr("x", LABW - 8).attr("y", y + 8).attr("font-size", 11.5).attr("fill", BLUE).attr("text-anchor", "end").attr("dominant-baseline", "central").text(r.name); let x0 = LABW; [[r.own, BLUE, "operated by " + r.name], [r.other, PINK, "operated by another claimant state"], [r.non, RED, "operated by a non-claimant state"]].forEach(([v, col, lab]) => { if (!v) return; bsvg.append("rect").attr("x", x0).attr("y", y + 1).attr("width", x(v)).attr("height", 14).attr("fill", col) .on("mousemove", e => showTip(e, [r.name + " sector", v + " " + lab, "As of " + EPOCH])).on("mouseleave", hideTip); x0 += x(v); }); bsvg.append("text").attr("x", x0 + 5).attr("y", y + 8).attr("font-size", 11).attr("fill", BLUE).attr("dominant-baseline", "central").text(r.own + r.other + r.non); }); bsvg.append("text").attr("x", 0).attr("y", BH - 3).attr("font-size", 10.5).attr("fill", BLUE).text("Overlapping sectors count shared facilities in each."); // Citation const cite = document.createElement("div"); cite.style.cssText = "margin:4px 0 0 0;font-size:12px;line-height:1.4;color:" + RED + ";"; const src = document.createElement("div"); src.textContent = "Source: COMNAP, Antarctic Facilities v3.5.0 (Polar Geospatial Center), " + EPOCH + "; claim limits from Natural Earth"; const stamp = document.createElement("div"); stamp.textContent = "North Branch Media"; stamp.style.fontWeight = "700"; cite.appendChild(src); cite.appendChild(stamp); root.appendChild(cite); return root; })()28:[] 25:{"id":"4b231a1b01c3bbb4","slug":"antarctic-facilities-by-operator-and-territorial-claim-may-2024","title":"Antarctic Facilities By Operator And Territorial Claim, May 2024","thumbnail":"a520376ecf1d10e4da85a22d8077db0d15c173fa7a9136419838a190fa2e4f1d","access_level":"public","create_time":"$D2026-10-07T18:41:41.238Z","update_time":"$D2026-10-07T18:48:59.942Z","view_time":null,"first_public_time":"$D2026-10-07T18:51:37.478Z","has_unpublished_edits":null,"fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"76a2df239d009536","login":"northbranchmedia","name":"North Branch Media","avatar_url":"https://avatars-next.observableusercontent.com/76819e141d8360b0fb326704433556feaf213b308230b2c1906d59298189200a","tier":"starter_2024","bio":""},"version":10,"publish_version":10,"role":null,"authored":false,"authors":[{"type":"individual","id":"1a4a5420f054ddf6","login":"north-branch-media","name":"North Branch Media","avatar_url":"https://avatars-next.observableusercontent.com/c80485c224f42cb4baa7e0bcefcda23343f268e832e216af1cc503d13623ea1c","tier":null,"bio":"Geopolitics, AI & markets. \r\nEssays at: https://northbranchmedia.substack.com/"}],"members":[{"type":"team","id":"76a2df239d009536","login":"northbranchmedia","name":"North Branch Media","avatar_url":"https://avatars-next.observableusercontent.com/76819e141d8360b0fb326704433556feaf213b308230b2c1906d59298189200a","tier":"starter_2024","role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"titling":"auto","title":"Antarctic Facilities By Operator And Territorial Claim, May 2024","cells":[{"id":1,"value":"# Antarctic Facilities By Operator And Territorial Claim, May 2024","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2,"value":"$27","pinned":true,"hidden":false,"mode":"ts","author":"$undefined","summary":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W28","stdlib":"2"}} 26:"$25:body"