Polyconic

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`.

90% match

Equidistant Conic Projection

This example shows a world map drawn with the equidistant conic projection, including a graticule, landmasses, and country boundaries. The map is rendered as SVG using D3’s `d3.geo.conicEquidistant` projection and `d3.geo.path` to generate the paths. A sphere outline and graticule are drawn first, then geographic data from a TopoJSON file (`world-50m.json`) is loaded with `topojson.feature` and `topojson.mesh` to display land and political borders.

85% match

Gnomonic

This example shows the world map projected using the gnomonic projection, where great circles appear as straight lines and distortion increases toward the edges. The map is clipped at a 90-degree angle, displaying landmasses in dark gray with white country boundaries over a graticule grid. The visualization uses D3 v3’s `d3.geo.gnomonic` projection and `d3.geo.path` to render SVG paths from TopoJSON world data, with the graticule drawn via `d3.geo.graticule`. The code sets projection scale, translation, and precision before loading the `world-50m.json` file.

82% match

Ginzburg V

This example displays a world map projected using the Ginzburg V polyconic projection, with landmasses filled in black and country boundaries outlined in white. A graticule grid and a sphere outline frame the map. The visualization loads world data from a TopoJSON file and renders it with SVG paths via `d3.geo.path()`. It uses the `d3.geo.ginzburg5()` projection from the d3.geo.projection plugin, and applies geographic features using `topojson.feature` and `topojson.mesh`.

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.

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.

Ginzburg VI

This example displays a world map using the Ginzburg VI polyconic projection, filling landmasses in dark gray against a white globe and overlaying graticule lines and country boundaries. It uses d3.geo.ginzburg6 from the d3.geo.projection plugin, with d3.geo.path for rendering, TopoJSON for world land and country data sourced from a gist, and SVG elements for the sphere, graticule, and hierarchical map layers.

Flat-Polar Quartic

This example displays a world map projected using the flat-polar quartic projection, which flattens the poles into curved, diamond-like shapes. The map shows landmasses in dark gray with country boundaries in white, overlaid on a graticule grid and enclosed by a circular sphere outline. It uses D3 v3 with the `d3.geo.mtFlatPolarQuartic` projection, `d3.geo.path` for rendering SVG paths, and TopoJSON to load world-50m geographic data. A graticule layer is generated via `d3.geo.graticule`, and the sphere outline is reused as both stroke and fill.