This example shows an interactive scatter plot of the Iris dataset, mapping sepal length to the x-axis and petal length to the y-axis, with each species represented by a distinct symbol from d3.symbolsFill. A custom shape legend displays the species labels and corresponding symbols. The visualization is built with D3 v7, using d3.scaleLinear for axes, d3.scaleOrdinal for shapes, and d3.csvParse to load data from a GitHub-hosted CSV file. The axes module generates labeled axes while the scatterPlot module renders symbols via d3.symbol.