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Feb 27, 2023
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Contour Labels (canvas)Coordinated mapsgeoformatSmall circle testKruskal MazeAll the geoshapesReprojecting Vector TilesCloud ContoursHello h3-jsClipping AlbersTranslucent EarthThe truth about the Mercator projectionUsing d3-inertia with observableMercator projection of a Mercator globeD3 Vector Tiles (WIP)Finding intersections between the graticule and the clip sphere of the stereographic projection, method 2Plate tectonicsAnother hex mapEquateur & tropiquesTissot's indicatrixDistance to shoreMultiPolygon clippingSouth Africa’s medial axisSpherical intersectionVolcano Semis (points circulaires)Pencil Airocean45° mapNetCDFBlue noise sphereRubber DymaxionSpherical quasi-random (R2) distributionAutomated label placement (countries)Automated label placement (France)Automated label placement (cities)d3.geoIntersectArcDelaunay.findTriangled3-geo-voronoi and gridded dataElevation vtk.jsMapfillKrigingSpherical HeatmapReproject elevation tiles — detailReproject elevation tiles — worldFisheye Conformal MapSpherical KDE InterpolationSpherical kernel interpolation with nearest neighborsShepard’s methodModified Shepard’s methodSpherical contoursGeo Voronoi interpolationBlurry contoursHow much warmer? (BBC)H3 hexagons & geoContoursHillshading & supersamplingH3 odditiesManhattan VoronoiManhattan Voronoi IIGeoJSON feature editorColorized Manhattan Spanning Treelegra mapslegra country mapsThe complex logarithm projectionCountries small multipleThe 2D approximate Newton-Raphson methodOceanAttitudeCount visible objectsThe Gray-Fuller spatial gridGray-Fuller grid metricsGray-Fuller grid odditiesSpherical smallest-circle problemBounding CirclesCountries Enclosing CirclesFullscreen Seamless Zoomable Map TilesMap Pan & ZoomSpherical EllipsesSynchronized projectionsThe closest countryTriangular tiling of icosahedronHello, polygon-clippingCorées / KoreasHello, procedural-glHello, placekeyZoom World ChoroplethClipping spherical polygonsSpherical phyllotaxisFour-color world map with ClingoHello, jsgeoda!The Sun’s analemmaWorld of squaresWorld of squares (spherical)A map of AfricaTagged bordersClipped geoVoronoiBlue noise sphere IISpherical Perlin NoiseSpherical Delaunay triangulationDynamic simplificationRewindPlot: Voronoi labelsAoC 12: shortest path under constraintsHello, pixi.jsRay out of a convex hullDistance to a segment
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Plot Experiments
Plot.plot({
projection: "equal-earth",
width,
marks: [
Plot.sphere({ fill: "#111" }),
Plot.geo(land, {fill: "#262626"}),
link(routeData, {
x1: d => d[0][0],
y1: d => d[0][1],
x2: d => d[1][0],
y2: d => d[1][1],
mixBlendMode: "screen",
opacity: 0.15,
strokeWidth: 1.25,
stroke: "#8014b7"
})
]
})
link = {
return function link(data, options) {
const link = Plot.link(data, options);
link.project = () => {}; // disable projection, we need raw coordinates for geoPath
link.render = function (
index,
scales,
{ x1: X1, y1: Y1, x2: X2, y2: Y2 },
{ width, height, marginLeft, marginRight, marginTop, marginBottom },
{ projection }
) {
width -= marginLeft + marginRight;
height -= marginTop + marginBottom;
const context = DOM.context2d(width, height);
context.translate(-marginLeft, -marginTop);
const path = d3.geoPath().projection(projection).context(context);
context.strokeStyle = this.stroke;
context.lineWidth = this.strokeWidth;
context.globalCompositeOperation = this.mixBlendMode;
context.globalAlpha = this.opacity;
for (const i of index) {
context.beginPath();
path({
type: "LineString",
coordinates: [
[X1[i], Y1[i]],
[X2[i], Y2[i]]
]
});
context.stroke();
}
return d3
.create("svg:image")
.attr("width", width)
.attr("height", height)
.attr("x", marginLeft)
.attr("y", marginTop)
.attr("xlink:href", context.canvas.toDataURL())
.node();
};
return link;
};
}
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