This example demonstrates a scatter plot that visualizes the Iris dataset, mapping sepal length and petal length on the axes while using distinct symbol shapes to represent the three iris species. The visualization includes labeled axes and a custom shape legend. Built with D3 v7, the code uses `d3.scaleLinear` for axes, `d3.scaleOrdinal` with `d3.symbolsFill` for shapes, and `d3.csvParse` to load the data. A modular ES6 structure separates the chart, axes, and legend into local modules.