This visualization displays the Clinical Commissioning Groups in England as of April 2016, rendered as a green land mass with white mesh boundaries on a light blue background. The map uses a Mercator projection centered on England and employs D3 v4 with TopoJSON to load and draw the geographic features. The land area is filled with green polygons, while the internal boundaries between commissioning groups are shown as a white mesh overlay, with both layers rendered as SVG paths.