jasondavies

A version of Mike Bostock’s animated world countries, which uses a more accurate spherical interpolation.

jasondavies

Trying to figure out if there’s a problem with Australia↔Austria spherical linear interpolation in the [World Countries][1] example, as hinted at by Hadley Wickham.

Note how the geodesic is always a straight line under the orthographic projection, since it is always going through the centre. (Except for the initial view centred at (0°, 0°), which is not on the geodesic). This is true for all azimuthal projections.

jasondavies

D3 2.11’s d3.geo.path will automatically cut features for any aspect. Try dragging to rotate the world and see a new aspect.

jasondavies

A version of Mike Bostock’s hexbin example, modified to use hexagons rotated by 90°. Aside from rotating the hexagon primitives, the only other change is to swap the meaning of x and y, for all inputs and outputs of the plugin.

jasondavies

{"type":"MultiPolygon","coordinates":[[[[-155.59,20.14],[-155.58,20.13],[-155.57,20.13],[-155.56,20.14],[-155.55,20.14],[-155.53,20.14],[-155.49,20.11],[-155.45,20.11],[-155.34,20.06],[-155.21,20],[-155.17,19.97],[-155.09,19.88],[-155.08,19.87],[-155.08,19.84],[-155.08,19.77],[-155.07,19.74],[-155.06,19.74],[-155.02,19.75],[-154.99,19.74],[-154.98,19.73],[-154.98,19.72],[-154.97,19.67],[-154.96,19.65],[-154.92,19.61],[-154.87,19.59],[-154.79,19.54],[-154.8,19.52],[-154.81,19.5],[-154.82,19.48],[-154.83,19.46],[-154.91,19.42],[-154.92,19.41],[-155.01,19.33],[-155.02,19.33],[-155.05,19.32],[-155.07,19.32],[-155.1,19.3],[-155.17,19.28],[-155.19,19.28],[-155.27,19.28],[-155.29,19.27],[-155.3,19.27],[-155.32,19.25],[-155.35,19.22],[-155.37,19.22],[-155.38,19.21],[-155.4,19.2],[-155.42,19.18],[-155.44,19.17],[-155.49,19.14],[-155.5,19.14],[-155.55,19.1],[-155.55,19.08],[-155.57,19.03],[-155.61,18.97],[-155.63,18.96],[-155.64,18.95],[-155.66,18.93],[-155.67,18.93],[-155.67,18.94],[-155.69,18.96],[-155.71,18.99],[-15

jasondavies

Stress test for antemeridian cutting!

jasondavies

Climatologist Irving I. Gringorten published this little-known equal-area projection in 1972.

It is available as d3.geo.gringorten in the geo.projection D3 plugin.

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Testing the new antemeridian cutting in the d3.geo.projection plugin.

jasondavies

A modified version of Mike Bostock’s mesmerising stereographic projection example.

A NASA Blue Marble raster image is reprojected using d3.geo.stereographic().invert from the geo.projection D3 plugin.

jasondavies

The Peirce quincuncial projection can be constructed using d3.geo.guyou from the geo.projection D3 plugin.