This example shows a scatter plot of the Iris dataset, mapping sepal length against petal length, with points shaped according to species. A custom shape legend identifies the three species. The visualization is built with D3 v7, using scaleLinear for axes, scaleOrdinal for shape encoding, and the axisBottom and axisLeft components. Data is loaded from a remote CSV and parsed with csvParse, while symbolsFill and symbol generate the point marks.