This scatter plot visualizes the relationship between sepal length and petal length for different iris species, using distinct glyph shapes to encode the categorical species variable. The visualization employs D3 v7's `scaleLinear` for the continuous axes, `scaleOrdinal` with `symbolsFill` for shape mapping, and a custom shape legend. Data is loaded as CSV from a GitHub repository and parsed with `csvParse`. The plot is rendered at full window size using D3's join-based approach with `select`, `path.mark`, and custom axis modules.