The demo displays a global grid of points every 10 degrees of latitude and longitude, simultaneously projected through two map projections and connected by curved lines. A static Albers projection is paired with an interactive orthographic projection, whose origin shifts as the mouse moves over the SVG. A dropdown menu changes the static projection to Mercator or stereographic, triggering a smooth transition of point positions and connection paths. The visualization uses D3 v2 methods such as `d3.geo.albers`, `d3.geo.azimuthal`, `transition().duration`, and jQuery event binding for the select control.