This scatter plot example uses D3 v7 to visualize data points with various shapes, mapping an additional categorical dimension through shape encoding. The visualization implements a custom axes module with axis labels, and a shape legend that displays the mapping between categorical values and symbol types. The code demonstrates importing specialized modules from local ES6 files and uses D3's scales, including `scaleLinear` and `scaleOrdinal`, along with `symbol()` from the `d3` namespace to generate the shapes for each data point.