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

graticule.extent([extent]) If extent is specified, sets the major and minor extents of this graticule. If extent

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

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

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

circle.center([center]) If center is specified, sets the circle center to the specified point [longitude

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

projection.translate([translate]) If translate is specified, sets the projection’s translation offset to the

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

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