This interactive scatter plot visualizes iris flower measurements, mapping sepal length and petal length on the x- and y-axes while using distinct symbols to encode the three species. The chart loads CSV data from a GitHub repository and parses it with `d3.csvParse`, then renders marks via `d3.symbol` and `symbolsFill`. A custom legend built with `scaleOrdinal` and `schemeCategory10` identifies each species, while reusable axis and legend modules handle the layout.