Published
Edited
Jul 27, 2019
4 forks
6 stars
Kerkovits projectionA map of AfricaCupola ProjectionClipping spherical polygonsA conformal AiroceanFill with strokeMarkley’s tetrahedral mapSynchronized projectionsSatellite GLSLVan Der Grinten IV GLSLVan Der Grinten III GLSLVan Der Grinten II GLSLWinkel Tripel GLSLLee Modified Stereographic GLSLMiller Oblated Stereographic GLSLModified Stereographic GS48 GLSLModified Stereographic GS50 GLSLFoucaut GLSLLagrange GLSLKavrayskiy VII GLSLEisenlohr GLSLEckert VI GLSLEckert V GLSLEckert IV GLSLEckert III GLSLEckert II GLSLEckert I GLSLBertin1953 GLSLRobinson GLSLMiller GLSLRectangular Polyconic GLSLPatterson GLSLPolyconic GLSLLoximuthal GLSLCylindrical Stereographic GLSLCylindrical Equal-Area GLSLTransverse Fahey GLSLFahey GLSLCollignon GLSLBromley GLSLBottomley GLSLHammer GLSLBonne GLSLBoggs GLSLBerghaus GLSLBaker Transverse GLSLBaker GLSLAugust GLSLAiry GLSLAitoff GLSLArmadillo GLSLLarrivée GLSLCylindrical Equal-Area GLSLAzimuthal Equidistant GLSLLittrow GLSLVan Der Grinten GLSLEquirectangular GLSLConic Conformal GLSLConic Equidistant GLSLAlbers GLSLConic Equal-Area GLSLEqual Earth GLSLTimes GLSLWagner IV GLSLWagner VI GLSLWagner VII GLSLWiechel GLSLAtlantis GLSLMollweide GLSLMercator GLSLTransverse Mercator GLSLCordiform GLSLWebMercator to globeVersor zooming for Three.jsAzimuthal Equal-Area GLSLBriesemeister GLSLRectilinear GLSLPhytoplanktonDanseiji projectionsTransverse MollweideThe 2D approximate Newton-Raphson methodInverting Lee’s Tetrahedral projectionAmerican PolyconicThe complex logarithm projectionRaster projection with GPU.jsH3 hexagons & geoContoursModified Stereographic ProjectionsFisheye Conformal Map (Cox)Fisheye Conformal MapFisheye Conformal Map (Tetrahedral)Transverse projectionsThe Imago projectionD3 ProjectionsImago Projection Distorsion AnalysisEPSG:5530Imago tilingCordiform map projections 💛💗💖MultiPolygon clippingThe Nicolosi Globular ProjectionFisheye GlobeHerbert Bayer’s Pacific OceanThe Behrmann projectionOronce Finé’s triangle projectionDa Vinci’s octant projectionThe Lotus projection (1958)The Voronoi projectionUsing proj4js with D3 and PlotMurphey Butterfly ProjectionEquateur & tropiquesVega projectionsMercator projection of a Mercator globeThe truth about the Mercator projectionOcean-centric Mollweide projectionBuckminster Fuller’s triangle transformationExperimental two world projectionsTobler’s hyperelliptical projection (1973)Jacques Bertin’s projection (1953)A map without Antarctica (Bertin1953 projection)Square Root Azimuthal projectionThe Log-Azimuthal projectionPeirce Quincuncial Projection, centered on the South PoleTranslucent Earth (Satellite projection)Lee’s conformal projection in a tetrahedronAirocean projectionCubic projectionsCox conformal projection in a triangleIcosahedral projectionsDodecahedral projectionThe Cahill-Keyes projection (1975)Polyhedral projections with d3-geo-polygonWagner customizable projectionParametrized Equal Earth ProjectionThe Hufnagel projection systemTissot's indicatrixAn equal-area projection for the cubic EarthBase map
Reproject elevation tiles — world
Also listed in…
Geo
projection = d3
.geoCahillKeyes()
.fitExtent([[1, 1], [width - 1, height - 1]], outline)
earth = d3.scaleSequential(d3.interpolateOranges).domain([0, 5000])
sea = d3.scaleSequential(d3.interpolateBlues).domain([0, -8000])
url = (x, y, z) =>
`https://tile.nextzen.org/tilezen/terrain/v1/256/terrarium/${z}/${x}/${y}.png?api_key=${api_key}`
w = tileSize
h = tileSize
mutable dem = DOM.canvas(w, h)
// the DEM tiles we load should encompass the whole area, and fall on exact screen coordinates (tx, ty are integers, and k equal to 256.
mercator = {
const mercator = d3.geoMercator().fitExtent([[0, 0], [w, h]], outline),
tiles = d3
.tile()
.size([w, h])
.scale(mercator.scale() * 2 * Math.PI)
.translate(mercator([0, 0]))(),
k = tileSize / tiles.scale;
return mercator
.scale(mercator.scale() * k)
.translate(mercator.translate().map(d => Math.round(d * k)));
}
tiles = d3
.tile()
.size([w, h])
.scale(mercator.scale() * 2 * Math.PI)
.translate(mercator([0, 0]))()
loader = {
const context = mutable dem.getContext("2d");
context.fillStyle = "#800000";
context.fillRect(0, 0, w, h);
tiles.forEach(([x, y, z], i, { translate: [tx, ty], scale: k }) => {
d3.image(url(...d3.tileWrap([x, y, z])), { crossOrigin: "Anonymous" }).then(
image => {
context.drawImage(image, (x + tx) * k, (y + ty) * k, k, k);
mutable dem = mutable dem;
}
);
});
return `loading ${tiles.length} tiles...`;
}
api_key = "7b1mrgvcThKgwl1ZslAhKQ" // claim your own API key at https://developers.nextzen.org/
rescale = d3.scaleSqrt()
data = {
const d = dem.getContext("2d").getImageData(0, 0, w, h).data,
val = (_, i) => {
const j = (h - 1 - ((i / w) | 0)) * w + (i % w), // flip
v = 256 * d[4 * j] + d[4 * j + 1] + d[4 * j + 1] / 256 - 32768;
return rescale(v);
};
return Float32Array.from({ length: w * h }, val);
}
contours = {
const contours = d3
.contours()
.size([w, h])
.thresholds(50)(data);
for (const c of contours) {
for (const polygon of c.coordinates)
for (const ring of polygon) {
for (var i = 0; i < ring.length; i++)
ring[i] = mercator.invert([ring[i][0] - 0.5, w - (ring[i][1] - 0.5)]); // flop
}
}
return contours;
}
extent = d3.extent(contours, d => rescale.invert(d.value))
// this is the area we want to cover
outline = ({ type: "Sphere" })
height = width / 2
tileSize = 256
d3 = require("d3@5", "d3-geo-projection@2", "d3-geo-polygon@1", "d3-tile@1")
land = d3.json(
"https://unpkg.com/visionscarto-world-atlas@0.0.6/world/110m_land.geojson"
)
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