SVG fundamentals
This example demonstrates the foundational use of SVG for basic data visualization, rendering a single circle on an otherwise empty HTML page. The code manually defines the circle’s geometry—center coordinates and radius—directly in the markup without any scripting. It relies on native SVG elements and CSS-free default styling, requiring no external libraries. The rendering approach is purely static, showcasing how raw SVG syntax can serve as the starting point for more complex charts or graphics, with the circle serving as a placeholder for future visual encodings.