This example shows how accessor functions can be used with the d3.arc() generator to draw a series of annular segments from an array of data objects, each with its own start and end angles. Using d3.arc() and the centroid method, the code creates SVG paths filled in orange and places white labels at the center of each arc. The data is supplied directly as JavaScript objects, and the d3.select() and join() pattern binds it to the DOM, with innerRadius and outerRadius fixed while angles vary per item.