{"version":"1.0","type":"rich","title":"Brush, Trendline, Legend, Linechart, Barchart","description":"This example visualizes EPA groundwater monitoring data for two observation wells at the Bog of the Ring using D3 v5 with SVG rendering. A main line chart displays water levels over time with an ordinal color scale and legend, while a smaller brush chart below allows users to select a date range. The brushed region updates the main chart’s x-axis domain and fits a least-squares regression trendline with its equation shown. Data is loaded from CSV files, parsed with d3.timeParse, and the chart uses d3.brushX, d3.line, d3.nest, and d3.scaleTime.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/3e51b3feffc840f89328d39376359cc0?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}