This example shows an Iris dataset scatter plot of sepal length against petal length, with points colored and shaped by species. A legend on the right maps each species to its corresponding symbol shape. The visualization is built using D3 v7, employing `scaleLinear` for the axes, `scaleOrdinal` with `symbolsFill` for shape encoding, and `symbol` to generate the point markers. Data is loaded asynchronously from a GitHub-hosted CSV and parsed with `csvParse`.