This visualization displays a scan path of eye-tracking fixations over a metro map of Antwerp, with a red line connecting fixation points and red circles marking each location. It combines two views: the raw scan path overlaid on the background image and a density contour layer rendered via `d3.contourDensity` with a sequential green color scale (`d3.scaleSequential(d3.interpolateGreens)`). The code loads data from a CSV file using `d3.csv`, scales coordinates with `d3.scaleLinear`, and draws paths using `d3.geoPath`. Fixation points are mapped to SVG coordinates, with contours computed from the same data points.