This interactive D3 v7 scatter plot visualizes the Iris dataset, plotting sepal length against petal length for individual flowers. The visualization encodes the categorical species variable through different point shapes, with a custom legend annotating each shape. Built using a modular structure with `scatterPlot`, `axes`, and `shapeLegend` modules, the example employs D3’s `scaleLinear`, `scaleOrdinal`, and `symbol` APIs to map data to positions and glyphs, while `csvParse` loads the remote CSV data. The chart updates dynamically within an SVG canvas sized to the browser window.