Bottomley projection

Bottomley

This example displays a world map using the Bottomley projection, a pseudocylindrical equal-area projection with curved parallels. Landmasses are filled in dark gray with white country boundaries, overlaid on a graticule and a black sphere outline. The code uses `d3.geo.bottomley()` from the d3.geo.projection plugin, rendered as SVG via `d3.geo.path()`. World data comes from a TopoJSON file, with countries meshed via `topojson.mesh` and land converted through `topojson.feature`.

90% match

August Projection

This example displays a world map using the August projection, a pseudocylindrical equal-area projection that curves parallels and meridians into distinctive intertwined shapes. The map renders land masses in dark gray with white country boundaries overlaid on a graticule, all enclosed within a spherical outline. Using D3 v3, the code employs `d3.geo.august` for the projection, `d3.geo.path` to draw geographic features, and `d3.geo.graticule` for the grid. TopoJSON data provides the world land and country boundaries, loaded from an external JSON file.

Tobler’s Hyperelliptical projection

This example demonstrates Tobler’s Hyperelliptical projection, a family of pseudocylindrical equal-area map projections with adjustable parameters alpha, gamma, and k. The default configuration renders a world map with a compact, oval-shaped graticule that balances area distortion across the globe. Using d3-geo-projection’s `geoHyperelliptical` projection, the map is drawn as SVG paths via `d3.geoPath`, with land polygons from world-atlas TopoJSON data. Interactive rotation and responsive resizing are enabled through d3-inertia and `fitExtent`.

PPhilippe Rivière

Tetrahedric Gnomonic Projection

This example visualizes the world using a tetrahedric gnomonic projection, a polyhedral map projection that unfolds the globe onto four triangular faces. The map renders landmasses and graticules on a Canvas via `d3.geoPath`, with the projection implemented through a custom `d3.geoTetrahedralLee` function that uses `d3.geoPolyhedral` and per-face gnomonic projections. The code includes a dashed inner triangle and outlined sphere boundary, and loads world data from the World Atlas TopoJSON dataset. It also spins the projection interactively using D3's rotation APIs and renders at devicePixelRatio for sharp output.

PPhilippe Rivière

Tobler–Mercator

This example demonstrates the Tobler–Mercator projection, a modified Mercator projection that preserves area. The world map is rendered with graticule lines, country boundaries, and a white sphere outline. Built with D3 v4, it combines `d3.geoProjection` with a custom projection function and `d3.geoPath` for geographic rendering. The map uses TopoJSON data from the world-atlas package, with land and country boundary geometries loaded via `d3.json` and processed using `topojson.feature` and `topojson.mesh`. The visualization is fully SVG-based.

Rectangular Polyconic

This example demonstrates the rectangular polyconic map projection, a pseudoconical projection that renders the world with curved meridians and straight parallels. The map shows landmasses in dark gray with country boundaries in white, overlaid on a graticule grid and enclosed by a spherical outline. Built with D3.js v3, it uses `d3.geo.rectangularPolyconic` from the extended projections plugin, `d3.geo.path` for geographic rendering, and `d3.geo.graticule` to generate the grid. World geometry comes from a TopoJSON file loaded via `topojson.feature` and `topojson.mesh`.

Briesemeister to Bertin1953

This example demonstrates the Bertin 1953 projection as a modified Briesemeister projection, visualized with a world map rendered from a TopoJSON file. Interactive checkboxes let the viewer alter the projection's aspect ratio, rotation, and asymmetric warping applied to the western, southern, or northern hemispheres. The custom projection function is built using `d3.geoProjection`, `d3.geoHammerRaw` from the d3-geo-projection package, and the map is drawn with `d3.geoPath` and a graticule in an SVG.

PPhilippe Rivière

78% match

Flat-Polar Parabolic

A flat-polar parabolic projection maps the world onto an oval-shaped canvas, with landmasses filled in dark gray and country boundaries marked by thin white lines. The visualization also includes a graticule grid and an outer sphere outline, rendered as SVG paths using d3.geo.path and the d3.geo.mtFlatPolarParabolic projection. Geographic data comes from a TopoJSON world file, processed via topojson.feature and topojson.mesh. The projection scale and translation are set explicitly, with precision configured for smooth rendering.