This visualization displays the classic Iris dataset as a scatter plot, mapping sepal length on the x-axis and petal length on the y-axis. Instead of using colors to differentiate species, the plot encodes species identity through distinct symbol shapes, such as circles, triangles, and crosses, with a corresponding legend at the right. The implementation uses D3.js v7 utilities like `scaleLinear`, `scaleOrdinal`, and `symbolGenerator` to position marks and generate the shape encodings. Data is loaded asynchronously from a remote CSV file and parsed with `csvParse`.