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Fork of Brush, Trendline, Legend, Linechart, Barchart

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AAndre J Denais
Last edited Jan 13, 2022
Created on Jan 13, 2022

The visualization shows groundwater monitoring data from two observation wells at the Bog of the Ring, plotting water levels over time as a line chart with a brushed time-range selector below. A dashed linear regression trendline appears for the selected period, calculated via the least-squares method in the `Regression.js` module. The implementation uses D3 v5 APIs including `d3.brushX`, `d3.scaleTime`, `d3.scaleLinear`, `d3.nest`, and `d3.line`, rendering to SVG with a categorical color scale to distinguish the two wells. Data is loaded from external CSV files.

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