2d:null 2e:["$","title",null,{"children":"Map Projection Classification | Nikita Sharov | Observable"}] 33:T47d4,projections = [ { name: "Gnomonic", surface: "Azimuthal", metrics: ["Gnomonic"], construction: ["Perspective"], creator: "Thales (possibly)", year: -580, yearApproximated: true, propertyName: "geoGnomonic" }, { name: "Orthographic", surface: "Azimuthal", construction: ["Perspective"], creator: "Hipparchos (first known user)", year: -200, yearApproximated: true, propertyName: "geoOrthographic" }, { name: "Stereographic", surface: "Azimuthal", metrics: ["Conformal"], construction: ["Perspective"], creator: "Hipparchos (first known user)", year: -200, yearApproximated: true, propertyName: "geoStereographic" }, { name: "Conic equidistant", surface: "Conic", metrics: ["Equidistant"], creator: "Ptolemy, C.; Ruysch, J. (1508); Mercator, G. (late 16th century); De l'Isle, N. (1745)", year: 100, yearApproximated: true, propertyName: "geoConicEquidistant" }, { name: "Equirectangular", surface: "Cylindrical", metrics: ["Equidistant"], creator: "Marinus of Tyre", year: 100, yearApproximated: true, propertyName: "geoEquirectangular" }, { name: "Azimuthal equidistant", surface: "Azimuthal", metrics: ["Equidistant"], creator: "Al-Biruni, A. R. (first known user); Mercator, G. (1569); Postel, g. (1581)", year: 1000, yearApproximated: true, propertyName: "geoAzimuthalEquidistant" }, { name: "Nicolosi globular", surface: "Polyconic", construction: ["Compromise"], creator: "Al-Biruni, A. R.; Nicolosi, G. B. (1660)", year: 1000, yearApproximated: true, propertyName: "geoNicolosi" }, { name: "Bonne", surface: "Pseudoconic", metrics: ["Equal-area"], creator: "Sylvanus, B.", year: 1511, propertyName: "geoBonne" }, { name: "Mercator", surface: "Cylindrical", metrics: ["Conformal", "Loxodromic"], creator: "Mercator, G.", year: 1569, propertyName: "geoMercator" }, { name: "Sinusoidal", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Cossin, J. (first known user)", year: 1570, propertyName: "geoSinusoidal" }, { name: "Sinusoidal interrupted", surface: "Pseudocylindrical", metrics: ["Equal-area"], construction: ["Interrupted"], creator: "USGS (last known user)", year: 1978, yearApproximated: true, propertyName: "geoInterruptedSinusoidal" }, { name: "Lambert azimuthal equal-area", surface: "Azimuthal", metrics: ["Equal-area"], creator: "Lambert, J. H.", year: 1772, propertyName: "geoAzimuthalEqualArea" }, { name: "Lambert conic conformal", surface: "Conic", metrics: ["Conformal"], creator: "Lambert, J. H.", year: 1772, propertyName: "geoConicConformal", unsuitable: true }, { name: "Lambert cylindrical equal-area", surface: "Cylindrical", metrics: ["Equal-area"], creator: "Lambert, J. H. (first known user)", year: 1772, propertyName: "geoCylindricalEqualArea" }, { name: "Lagrange", surface: "Miscellaneous", metrics: ["Conformal"], creator: "Lambert, J. H.", year: 1772, propertyName: "geoLagrange" }, { name: "Conic equal-area", surface: "Conic", metrics: ["Equal-area"], creator: "Albers, H. C.", year: 1805, propertyName: "geoConicEqualArea" }, { name: "Mollweide", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Mollweide, K. B.", year: 1805, propertyName: "geoMollweide" }, { name: "Mollweide hemispheres", surface: "Pseudocylindrical", metrics: ["Equal-area"], construction: ["Interrupted"], propertyName: "geoInterruptedMollweideHemispheres" }, { name: "Polyconic", surface: "Polyconic", construction: ["Compromise"], creator: "Hassler, F. R.", year: 1820, yearApproximated: true, propertyName: "geoPolyconic" }, { name: "Transverse Mercator", surface: "Cylindrical", metrics: ["Conformal"], creator: "Gauss, C. F., Krüger, J. H. L.", year: 1822, propertyName: "geoTransverseMercator" }, { name: "Littrow", surface: "Other", metrics: ["Conformal", "Retroazimuthal"], creator: "Littrow, J. J.; Weir, P. (1890)", year: 1833, propertyName: "geoLittrow", unsuitable: true }, { name: "Rectangular polyconic", surface: "Polyconic", construction: ["Compromise"], creator: "U.S. Coast Survey", year: 1853, yearApproximated: true, propertyName: "geoRectangularPolyconic" }, { name: "Cylindrical stereographic", surface: "Cylindrical", construction: ["Compromise"], creator: "Gall, J.; Braun, C. (1867)", year: 1855, propertyName: "geoCylindricalStereographic" }, { name: "Airy", surface: "Azimuthal", construction: ["Compromise"], creator: "Airy, G. B.", year: 1861, propertyName: "geoAiry" }, { name: "Foucaut", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Foucaut de Prépetit", year: 1862, propertyName: "geoFoucaut" }, { name: "Foucaut sinusoidal", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Foucaut de Prépetit", year: 1862, propertyName: "geoFoucautSinusoidal" }, { name: "Collignon", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Collignon, E.", year: 1865, yearApproximated: true, propertyName: "geoCollignon" }, { name: "Collignon polyhedral", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Collignon, E.", year: 1865, yearApproximated: true, propertyName: "geoPolyhedralCollignon" }, { name: "Eisenlohr", surface: "Miscellaneous", metrics: ["Conformal"], creator: "Eisenlohr, F.", year: 1870, propertyName: "geoEisenlohr" }, { name: "August", surface: "Miscellaneous", metrics: ["Conformal"], creator: "August, F. W. O., Bellermann, G.", year: 1874, propertyName: "geoAugust" }, { name: "Berghaus", surface: "Azimuthal", construction: ["Compromise"], creator: "Berghaus, H.", year: 1879, propertyName: "geoBerghaus" }, { name: "Peirce quincuncial", surface: "Miscellaneous", creator: "Peirce, C. S.", year: "1879", propertyName: "geoPeirceQuincuncial" }, { name: "Wiechel", surface: "Azimuthal", metrics: ["Equal-area"], creator: "Wiechel, W. H.", year: 1879, propertyName: "geoWiechel" }, { name: "Guyou", surface: "Miscellaneous", metrics: ["Conformal"], creator: "Guyou, E.", year: 1887, propertyName: "geoGuyou" }, { name: "Aitoff", surface: "Pseudoazimuthal", construction: ["Compromise"], creator: "Aitoff, D.", year: 1889, propertyName: "geoAitoff" }, { name: "Hammer", surface: "Azimuthal", metrics: ["Retroazimuthal"], creator: "Hammer, E.", year: 1892, propertyName: "geoHammer" }, { name: "Nell–Hammer", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Hammer, H. H. E. v.", year: 1900, propertyName: "geoNellHammer" }, { name: "Van der Grinten", surface: "Miscellaneous", construction: ["Compromise"], creator: "Van der Grinten, A. J.", year: 1904, propertyName: "geoVanDerGrinten" }, { name: "Van der Grinten IV", surface: "Miscellaneous", construction: ["Compromise"], creator: "Van der Grinten, A. J.", year: 1904, propertyName: "geoVanDerGrinten4" }, { name: "Eckert I", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Eckert-Greifendorff, M.", year: 1906, propertyName: "geoEckert1" }, { name: "Eckert II", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Eckert-Greifendorff, M.", year: 1906, propertyName: "geoEckert2" }, { name: "Eckert III", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Eckert-Greifendorff, M.", year: 1906, propertyName: "geoEckert3" }, { name: "Eckert IV", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Eckert-Greifendorff, M.", year: 1906, propertyName: "geoEckert4" }, { name: "Eckert V", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Eckert-Greifendorff, M.", year: 1906, propertyName: "geoEckert5" }, { name: "Eckert VI", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Eckert-Greifendorff, M.", year: 1906, propertyName: "geoEckert6" }, { name: "Craig", surface: "Pseudocylindrical", metrics: ["Retroazimuthal"], construction: ["Compromise"], creator: "Craig, J. I.", year: 1909, propertyName: "geoCraig" }, { name: "Van der Grinten II", surface: "Miscellaneous", construction: ["Compromise"], creator: "Bludau, A.", year: 1912, propertyName: "geoVanDerGrinten2" }, { name: "Van der Grinten III", surface: "Miscellaneous", construction: ["Compromise"], creator: "Bludau, A.", year: 1912, propertyName: "geoVanDerGrinten3" }, { name: "Winkel", surface: "Pseudoazimuthal", construction: ["Compromise"], creator: "Winkel, O.", year: 1921, propertyName: "geoWinkel3" }, { name: "Homolosine", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Goode, J. P.", year: 1923, propertyName: "geoHomolosine" }, { name: "Homolosine interrupted", surface: "Pseudocylindrical", metrics: ["Equal-area"], construction: ["Interrupted"], creator: "Goode, J. P.", year: 1923, propertyName: "geoInterruptedHomolosine" }, { name: "Boggs eumorphic", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Boggs, S. W.", year: 1929, propertyName: "geoBoggs" }, { name: "Boggs eumorphic interrupted", surface: "Pseudocylindrical", metrics: ["Equal-area"], construction: ["Interrupted"], creator: "Boggs, S. W.", year: 1929, propertyName: "geoInterruptedBoggs" }, { name: "Craster", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Craster, J. E. E.", year: 1929, propertyName: "geoCraster" }, { name: "Wagner IV", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Wagner, K. H.", year: 1932, propertyName: "geoWagner4" }, { name: "Wagner VI", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Wagner, K. H.", year: 1932, propertyName: "geoWagner6" }, { name: "Loximuthal", surface: "Pseudocylindrical", metrics: ["Loxodromic"], creator: "Siemon, K.; Tobler, W. R. (1966)", year: 1935, propertyName: "geoLoximuthal" }, { name: "Quartic authalic interrupted", surface: "Pseudocylindrical", metrics: ["Equal-area"], construction: ["Interrupted"], creator: "Siemon, K.; Adams O. S. (1944)", year: 1937, propertyName: "geoInterruptedQuarticAuthalic" }, { name: "Ginzburg IV", surface: "Polyconic", construction: ["Compromise"], creator: "Ginzburg, G. A.", year: 1939, propertyName: "geoGinzburg4" }, { name: "Kavrayskiy VII", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Kavrayskiy, V. V.", year: 1939, propertyName: "geoKavrayskiy7" }, { name: "Wagner VII", surface: "Pseudoazimuthal", metrics: ["Equal-area"], creator: "Wagner, K. H.", year: 1941, propertyName: "geoWagner7" }, { name: "Miller", surface: "Cylindrical", construction: ["Compromise"], creator: "Miller, O. M.", year: 1942, propertyName: "geoMiller" }, { name: "Armadillo", surface: "Miscellaneous", construction: ["Compromise"], creator: "Raisz, E.", year: 1943, propertyName: "geoArmadillo" }, { name: "Gingery", surface: "Miscellaneous", construction: ["Compromise"], creator: "Cram, G. F.", year: 1943, yearApproximated: true, propertyName: "geoGingery" }, { name: "Ginzburg VIII", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Ginzburg, G. A.", year: 1944, propertyName: "geoGinzburg8" }, { name: "McBryde–Thomas flat-polar parabolic", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "McBryde, F. W., Thomas, P. D.", year: 1949, propertyName: "geoMtFlatPolarParabolic" }, { name: "McBryde–Thomas flat-polar quartic", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "McBryde, F. W.; Thomas, P. D.", year: 1949, propertyName: "geoMtFlatPolarQuartic" }, { name: "McBryde–Thomas flat-polar sinusoidal", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "McBryde, F. W.; Thomas, P. D.", year: 1949, propertyName: "geoMtFlatPolarSinusoidal" }, { name: "Wagner VIII", surface: "Azimuthal", construction: ["Compromise"], creator: "Wagner, K. H.", year: 1949, propertyName: "geoWagner" }, { name: "Ginzburg V", surface: "Polyconic", construction: ["Compromise"], creator: "Ginzburg, G. A.", year: 1950, propertyName: "geoGinzburg5" }, { name: "Ginzburg VI", surface: "Polyconic", construction: ["Compromise"], creator: "Ginzburg, G. A.", year: 1950, propertyName: "geoGinzburg6" }, { name: "Bertin", surface: "Miscellaneous", construction: ["Compromise"], creator: "Bertin, J.", year: 1953, propertyName: "geoBertin1953" }, { name: "Sinu-Mollweide", surface: "Pseudocylindrical", metrics: ["Equal-area"], construction: ["Hybrid"], creator: "Philbrick, A. K.", year: 1953, propertyName: "geoSinuMollweide" }, { name: "Sinu-Mollweide interrupted", surface: "Pseudocylindrical", metrics: ["Equal-area"], construction: ["Hybrid", "Interrupted"], creator: "Philbrick, A. K.", year: 1953, propertyName: "geoInterruptedSinuMollweide" }, { name: "Hill", surface: "Pseudoconic", metrics: ["Equal-area"], creator: "Hill, K. O.", year: 1958, propertyName: "geoHill" }, { name: "Robinson", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Robinson, A. H.", year: 1963, propertyName: "geoRobinson" }, { name: "Bromley", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Bromley, R. H.", year: 1965, propertyName: "geoBromley" }, { name: "Times", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Muir, J.", year: 1965, propertyName: "geoTimes" }, { name: "Ginzburg IX", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Ginzburg, G. A.", year: 1966, propertyName: "geoGinzburg9" }, { name: "Gringorten", surface: "Miscellaneous", metrics: ["Equal-area"], creator: "Gringorten, I. I.", year: 1972, propertyName: "geoGringorten" }, { name: "Gringorten quincuncial", surface: "Miscellaneous", creator: "Gringorten, I. I.", year: 1972, propertyName: "geoGringortenQuincuncial" }, { name: "Hyperelliptical", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Tobler, W. R.", year: 1973, propertyName: "geoHyperelliptical" }, { name: "Fahey", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Fahey, L.", year: 1975, propertyName: "geoFahey" }, { name: "Gilbert", surface: "Miscellaneous", construction: ["Compromise"], creator: "Gilbert, E. N.", year: 1975, propertyName: "geoGilbert" }, { name: "Baker", surface: "Miscellaneous", construction: ["Compromise"], creator: "Baker, J. G. P.", year: 1986, propertyName: "geoBaker" }, { name: "Larrivée", surface: "Miscellaneous", construction: ["Compromise"], creator: "Larrivée, L.", year: 1988, propertyName: "geoLarrivee" }, { name: "Hufnagel", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Hufnagel, H.", year: 1989, propertyName: "geoHufnagel" }, { name: "Laskowski", surface: "Miscellaneous", construction: ["Compromise"], creator: "Laskowski, P.", year: 1991, propertyName: "geoLaskowski" }, { name: "Waterman butterfly", surface: "Miscellaneous", construction: ["Compromise", "Polyhedral"], creator: "Waterman, S.", year: 1996, propertyName: "geoPolyhedralWaterman" }, { name: "HEALPix", surface: "Pseudocylindrical", metrics: ["Equal-area"], construction: ["Hybrid", "Interrupted"], creator: "Gorski, K. M.", year: 1997, propertyName: "geoHealpix" }, { name: "Bottomley", surface: "Pseudoconic", metrics: ["Equal-area"], creator: "Bottomley, H.", year: 2003, propertyName: "geoBottomley" }, { name: "Natural Earth", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Patterson, T.", year: 2012, propertyName: "geoNaturalEarth1" }, { name: "Patterson", surface: "Cylindrical", construction: ["Compromise"], creator: "Patterson, T., Savric, B., Jenny, B.", year: 2014, propertyName: "geoPatterson" }, { name: "Natural Earth II", surface: "Pseudocylindrical", construction: ["Compromise"], creator: "Patterson, T., Savric, B., Jenny, B.", year: 2015, propertyName: "geoNaturalEarth2" }, { name: "Equal Earth", surface: "Pseudocylindrical", metrics: ["Equal-area"], creator: "Patterson, T., Savric, B., Jenny, B.", year: 2018, propertyName: "geoEqualEarth", githubUrl: "https://github.com/d3/d3-geo#geoEqualEarth" } ]34:[] 31:{"id":"65b3d6bed6a887cb","slug":"map-projection-classification","title":"Map Projection Classification","thumbnail":"6036992e1e6ea11c0abfc3618c4c546e4482b593befe055c790e5ce5019fbd61","access_level":"public","create_time":"$D2020-12-08T09:25:33.640Z","update_time":"$D2021-05-08T11:50:07.356Z","view_time":null,"first_public_time":"$D2020-12-10T11:09:28.307Z","has_unpublished_edits":null,"fork":false,"stars":11,"starred":false,"owner":{"type":"team","id":"6c49d8d38db08400","login":"nikita-sharov","name":"Nikita Sharov","avatar_url":"https://avatars-next.observableusercontent.com/544afb614871e9f3bee546cbff7e689f2a454464b16ac434007893bde877f2df","tier":"starter_2024"},"version":846,"publish_version":846,"role":null,"authored":false,"authors":[{"type":"individual","id":"ee7c67b988c5530c","login":"nikita-sharov","name":"Nikita Sharov","avatar_url":"https://avatars-next.observableusercontent.com/544afb614871e9f3bee546cbff7e689f2a454464b16ac434007893bde877f2df","tier":null}],"members":[{"type":"individual","id":"ee7c67b988c5530c","login":"nikita-sharov","name":"Nikita Sharov","avatar_url":"https://avatars-next.observableusercontent.com/544afb614871e9f3bee546cbff7e689f2a454464b16ac434007893bde877f2df","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":4,"collection":{"id":"c820f2af0d45ff3a","slug":"cartography","title":"Cartography","owner":{"id":"6c49d8d38db08400","login":"nikita-sharov","name":"Nikita Sharov"}},"type":"notebook","body":{"title":"Map Projection Classification","cells":[{"id":0,"value":"md`# Map Projection Classification\n\nDistributing [d3-geo-projection](https://github.com/d3/d3-geo-projection)s by`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":9,"value":"viewof surface = {\n const options = [\n \"Cylindrical\",\n \"Pseudocylindrical\",\n \"Conic\",\n \"Pseudoconic\",\n \"Polyconic\",\n \"Azimuthal\",\n \"Pseudoazimuthal\",\n \"Miscellaneous\"\n ];\n \n return radio({\n title: \"Surface\",\n options,\n value: options[0] \n });\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":11,"value":"viewof metric = {\n const metrics = projectionsBySurface.filter(d => d.metrics !== undefined)\n .map(d => d.metrics)\n .flat();\n \n const uniqueMetrics = [...new Set(metrics)];\n const options = [\"Any\", ...uniqueMetrics].sort();\n return radio({\n title: \"Metric\",\n options,\n value: options[0]\n }); \n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":114,"value":"viewof construction = { \n const constructions = projectionsBySurfaceAndMetric.filter(d => d.construction !== undefined)\n .map(d => d.construction)\n .flat();\n\n const uniqueConstructions = [...new Set(constructions)];\n const options = [\"Any\", ...uniqueConstructions].sort()\n return radio({\n title: \"Construction\",\n options,\n value: options[0]\n });\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":13,"value":"viewof name = { \n let options = projectionsBySurfaceMetricAndConstruction.map(d => d.name).sort();\n return radio({\n title: \"Name\",\n options,\n value: options[0]\n });\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":15,"value":"html`\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":439,"value":"md`---\n## Metadata\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":421,"value":"$33","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":441,"value":"md`### Sources\n\n- [List of map projections](https://en.wikipedia.org/wiki/List_of_map_projections), en.wikipedia.org\n- [List of available Map Projections](https://map-projections.net/projections-list.php), map-projections.net\n- [Directory of Map Projections](https://www.mapthematics.com/ProjectionsList.php), mapthematics.com\n- [A Gallery of Map Projections](http://www.csiss.org/map-projections/index.html), csiss.org`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":547,"value":"md`---\n## Geometry`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":461,"value":"topology = (await fetch(\"https://cdn.jsdelivr.net/npm/world-atlas@2/land-50m.json\")).json()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":446,"value":"land = topojson.feature(topology, topology.objects.land)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":550,"value":"md`---\n## Representation`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":35,"value":"height = {\n const projection = createProjection().fitWidth(planeWidth, outline)\n const [[x0, y0], [x1, y1]] = d3.geoPath(projection).bounds(outline);\n return Math.ceil(y1 - y0) + (margin * 2);\n};","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":49,"value":"createProjection = {\n const meta = projections.find(d => d.name === name);\n return d3[meta.propertyName];\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":532,"value":"planeWidth = width - (margin * 2)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":478,"value":"margin = 2","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":47,"value":"outline = ({type: \"Sphere\"})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":45,"value":"path = d3.geoPath(projection)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":516,"value":"projection = createProjection().fitWidth(planeWidth, outline)\n .translate([width / 2, height / 2])","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":43,"value":"graticule = d3.geoGraticule10() // meridians / parallels every 10°","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":166,"value":"md`---\n## Appendix`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":54,"value":"d3 = require(\"d3@6\", \"d3-geo-projection@3\")","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":449,"value":"topojson = require(\"topojson-client@3\")","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":25,"value":"import {radio} from \"@jashkenas/inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":660,"value":"projectionsBySurface = projections.filter(d => (d.surface === surface) && !d.unsuitable);","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":665,"value":"projectionsBySurfaceAndMetric = {\n if (metric === \"Any\") {\n return projectionsBySurface;\n } \n \n return projectionsBySurface.filter(d => d.metrics !== undefined)\n .filter(d => d.metrics.includes(metric)); \n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":667,"value":"projectionsBySurfaceMetricAndConstruction = {\n if (construction === \"Any\") {\n return projectionsBySurfaceAndMetric;\n }\n \n return projectionsBySurfaceAndMetric.filter(d => d.construction !== undefined)\n .filter(d => d.construction.includes(construction));\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":55,"value":"html``","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W34","stdlib":"1","titling":"auto"}} 32:"$31:body"