Project Algernon visualizes cycling rides by mapping GPS coordinates with D3's `geoPath` and `geoMercator` projection, alongside a time-series chart that plots power output in watts. The chart uses `scaleTime` and `scaleLinear` axes, with a moving average window selectable via dropdown (1s to 1h). A gradient-stroked line and interactive circles with tooltips show power over time, while the map displays the ride route. Data loads from JSON files via the `json` API, rendered as SVG within a React interface.