threshold.copy() Returns an exact copy of this scale. Changes to this scale will not affect the returned scale, and vice versa.

pow.nice([count]) See continuous.nice.

quantize.nice() Equivalent to continuous.nice.

d3.geoEquirectangular() d3.geoEquirectangularRaw The equirectangular (plate carrée) projection; see d3-geo. The Cassini projection is the transverse aspect of the equirectangular projection.

graticule.stepMajor([step]) If step is specified, sets the major step for this graticule. If step is not specified, returns the current major step, which defaults to ⟨90°, 360°⟩.

radialArea.context([context]) Equivalent to line.context.

d3.symbolWye The Y-shape symbol type.

map.empty() Returns true if and only if this map has zero entries.

d3.interpolateBasisClosed(values) Returns a uniform nonrational B-spline interpolator through the specified array of values, which must be numbers. The control points are implicitly repeated such that the resulting one-dimensional spline has cyclical C² continuity when repeated around t in [0,1]. See also d3.curveBasisClosed.

d3.geoGinzburg5() d3.geoGinzburg5Raw The Ginzburg V projection.