projection.clipAngle([angle]) If angle is specified, sets the projection’s clipping circle radius to the specified

d3.geoDistance(a, b) Returns the great-arc distance in

projection.fitExtent(extent, object) Sets the projection’s

graticule() Returns a GeoJSON MultiLineString geometry object representing all meridians and parallels for this graticule.

graticule.stepMajor([step]) If step is specified, sets the major step for this graticule. If step

circle(arguments…) Returns a new GeoJSON geometry object of type “Polygon” approximating a circle on the surface of a sphere

circle.precision([angle]) If precision is specified, sets the circle precision to the specified angle in degrees

projection.fitSize(size, object) A convenience method for

d3.geoEquirectangular() d3.geoEquirectangularRaw

d3.geoCentroid(feature) Returns the spherical centroid of the specified GeoJSON feature. See also