d3.arc() Constructs a new arc generator with the default settings.

projection(point) Returns a new array [x, y] (typically in pixels) representing the projected point of the given point. The point must be specified as a two-element array [longitude, latitude] in degrees. May return null if the specified point has no defined projected position, such as when the point is outside the clipping bounds of the projection.

quadtree.copy() Returns a copy of the quadtree. All nodes in the returned quadtree are identical copies of the corresponding node in the quadtree; however, any data in the quadtree is shared by reference and not copied.

d3.forceCollide([radius]) Creates a new circle collision force with the specified radius. If radius is not specified, it defaults to the constant one for all nodes.

d3.geoModifiedStereographicMiller() A modified stereographic projection for Europe and Africa. Typically clipped to the geographic extent [[-40°, -40°], [80°, 80°]].

d3.geoPeirceQuincuncial() The Peirce quincuncial projection is the quincuncial form of the Guyou projection.

d3.interpolateGreens(t) d3.schemeGreens Given a number t in the range [0,1], returns the corresponding color from the “Greens” sequential color scheme represented as an RGB string.

link.iterations([iterations]) If iterations is specified, sets the number of iterations per application to the specified number and returns this force. If iterations is not specified, returns the current iteration count which defaults to 1. Increasing the number of iterations greatly increases the rigidity of the constraint and is useful for complex structures such as lattices, but also increases the runtime cost to evaluate the force.

d3.geoAzimuthalEquidistant() d3.geoAzimuthalEquidistantRaw The azimuthal equidistant projection.

area.y([y]) If y is specified, sets y0 to y and y1 to null and returns this area generator. If y is not specified, returns the current y0 accessor.