This visualization displays the classic Iris dataset as a scatter plot, mapping sepal length and petal length on the x- and y-axes while using distinct symbols to encode the three iris species. The chart is built using D3 version 7 APIs, including `scaleLinear`, `scaleOrdinal`, `schemeCategory10`, `symbolsFill`, and `symbol`. Axis generation and labels are handled by custom helper modules (`axes.js`, `shapeLegend.js`), which leverage D3’s `axisLeft`, `axisBottom`, and a symbol generator. Data is fetched as CSV from a remote source and parsed with `csvParse`.