This contour plot visualizes a 2D function’s level sets, with each colored band representing a distinct elevation range. The SVG rendering uses filled rectangles and complex path coordinates—drawn via vector paths rather than a raster grid—to outline the contour lines and label regions. It is built with raw SVG path data, employing cubic and quadratic Bézier curves (via `C`, `Q`, and `V` commands) to trace the smooth isolines, and relies on linear gradients for the color fills. The source appears to be a computed dataset, encoded directly into the SVG's coordinate system.