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Edited
Aug 1, 2023
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projections = [
{name: "Airy’s minimum error", value: d3.geoAiry},
{name: "Aitoff", value: d3.geoAitoff},
{name: "American polyconic", value: d3.geoPolyconic},
{name: "armadillo", value: d3.geoArmadillo},
{name: "August", value: d3.geoAugust},
{name: "azimuthal equal-area", value: d3.geoAzimuthalEqualArea},
{name: "azimuthal equidistant", value: d3.geoAzimuthalEquidistant},
{name: "Baker dinomic", value: d3.geoBaker},
{name: "Berghaus’ star", value: d3.geoBerghaus},
{name: "Bertin’s 1953", value: d3.geoBertin1953},
{name: "Boggs’ eumorphic", value: d3.geoBoggs},
{name: "Boggs’ eumorphic (interrupted)", value: d3.geoInterruptedBoggs},
{name: "Bonne", value: d3.geoBonne},
{name: "Bottomley", value: d3.geoBottomley},
{name: "Bromley", value: d3.geoBromley},
{name: "Butterfly (gnomonic)", value: d3.geoPolyhedralButterfly},
{name: "Butterfly (Collignon)", value: d3.geoPolyhedralCollignon},
{name: "Butterfly (Waterman)", value: d3.geoPolyhedralWaterman},
{name: "Collignon", value: d3.geoCollignon},
// {name: "conic conformal", value: d3.geoConicConformal}, // Not suitable for world maps.
{name: "conic equal-area", value: d3.geoConicEqualArea},
{name: "conic equidistant", value: d3.geoConicEquidistant},
{name: "Craig retroazimuthal", value: d3.geoCraig},
{name: "Craster parabolic", value: d3.geoCraster},
{name: "cylindrical equal-area", value: d3.geoCylindricalEqualArea},
{name: "cylindrical stereographic", value: d3.geoCylindricalStereographic},
{name: "Eckert I", value: d3.geoEckert1},
{name: "Eckert II", value: d3.geoEckert2},
{name: "Eckert III", value: d3.geoEckert3},
{name: "Eckert IV", value: d3.geoEckert4},
{name: "Eckert V", value: d3.geoEckert5},
{name: "Eckert VI", value: d3.geoEckert6},
{name: "Eisenlohr conformal", value: d3.geoEisenlohr},
{name: "Equal Earth", value: d3.geoEqualEarth},
{name: "Equirectangular (plate carrée)", value: d3.geoEquirectangular},
{name: "Fahey pseudocylindrical", value: d3.geoFahey},
{name: "flat-polar parabolic", value: d3.geoMtFlatPolarParabolic},
{name: "flat-polar quartic", value: d3.geoMtFlatPolarQuartic},
{name: "flat-polar sinusoidal", value: d3.geoMtFlatPolarSinusoidal},
{name: "Foucaut’s stereographic equivalent", value: d3.geoFoucaut},
{name: "Foucaut’s sinusoidal", value: d3.geoFoucautSinusoidal},
{name: "general perspective", value: d3.geoSatellite},
{name: "Gilbert’s two-world", value: d3.geoGilbert},
{name: "Gingery", value: d3.geoGingery},
{name: "Ginzburg V", value: d3.geoGinzburg5},
{name: "Ginzburg VI", value: d3.geoGinzburg6},
{name: "Ginzburg VIII", value: d3.geoGinzburg8},
{name: "Ginzburg IX", value: d3.geoGinzburg9},
{name: "Goode’s homolosine", value: d3.geoHomolosine},
{name: "Goode’s homolosine (interrupted)", value: d3.geoInterruptedHomolosine},
{name: "gnomonic", value: d3.geoGnomonic},
{name: "Gringorten square", value: d3.geoGringorten},
{name: "Gringorten quincuncial", value: d3.geoGringortenQuincuncial},
{name: "Guyou square", value: d3.geoGuyou},
{name: "Hammer", value: d3.geoHammer},
{name: "Hammer retroazimuthal", value: d3.geoHammerRetroazimuthal},
{name: "HEALPix", value: d3.geoHealpix},
{name: "Hill eucyclic", value: d3.geoHill},
{name: "Hufnagel pseudocylindrical", value: d3.geoHufnagel},
{name: "Kavrayskiy VII", value: d3.geoKavrayskiy7},
{name: "Lagrange conformal", value: d3.geoLagrange},
{name: "Larrivée", value: d3.geoLarrivee},
{name: "Laskowski tri-optimal", value: d3.geoLaskowski},
// {name: "Littrow retroazimuthal", value: d3.geoLittrow}, // Not suitable for world maps.
{name: "Loximuthal", value: d3.geoLoximuthal},
{name: "Mercator", value: d3.geoMercator},
{name: "Miller cylindrical", value: d3.geoMiller},
{name: "Mollweide", value: d3.geoMollweide},
{name: "Mollweide (Goode’s interrupted)", value: d3.geoInterruptedMollweide},
{name: "Mollweide (interrupted hemispheres)", value: d3.geoInterruptedMollweideHemispheres},
{name: "Natural Earth", value: d3.geoNaturalEarth1},
{name: "Natural Earth II", value: d3.geoNaturalEarth2},
{name: "Nell–Hammer", value: d3.geoNellHammer},
{name: "Nicolosi globular", value: d3.geoNicolosi},
{name: "orthographic", value: d3.geoOrthographic},
{name: "Patterson cylindrical", value: d3.geoPatterson},
{name: "Peirce quincuncial", value: d3.geoPeirceQuincuncial},
{name: "rectangular polyconic", value: d3.geoRectangularPolyconic},
{name: "Robinson", value: d3.geoRobinson},
{name: "sinusoidal", value: d3.geoSinusoidal},
{name: "sinusoidal (interrupted)", value: d3.geoInterruptedSinusoidal},
{name: "sinu-Mollweide", value: d3.geoSinuMollweide},
{name: "sinu-Mollweide (interrupted)", value: d3.geoInterruptedSinuMollweide},
{name: "stereographic", value: d3.geoStereographic},
{name: "Times", value: d3.geoTimes},
{name: "Tobler hyperelliptical", value: d3.geoHyperelliptical},
{name: "transverse Mercator", value: d3.geoTransverseMercator},
{name: "Van der Grinten", value: d3.geoVanDerGrinten},
{name: "Van der Grinten II", value: d3.geoVanDerGrinten2},
{name: "Van der Grinten III", value: d3.geoVanDerGrinten3},
{name: "Van der Grinten IV", value: d3.geoVanDerGrinten4},
{name: "Wagner IV", value: d3.geoWagner4},
{name: "Wagner VI", value: d3.geoWagner6},
{name: "Wagner VII", value: d3.geoWagner7},
{name: "Werner", value: () => d3.geoBonne().parallel(90)},
{name: "Wiechel", value: d3.geoWiechel},
{name: "Winkel tripel", value: d3.geoWinkel3}
]
function projectionInput({name = "", value} = {}) {
const form = html`<form><select name=i>${projections.map(p => {
return Object.assign(html`<option>`, {
textContent: p.name,
selected: p.name === value
});
})}</select> <i style="font-size:smaller;">${name}</i>`;
form.onchange = () => form.dispatchEvent(new CustomEvent("input"));
form.oninput = () => form.value = projections[form.i.selectedIndex].value();
form.oninput();
return form;
}
world = FileAttachment("world.json").json()
d3 = require("d3-geo@3", "d3-geo-projection@4")
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
