This interactive scatterplot visualizes population data for Berlin’s LOR planning areas, showing residents by age group. A dropdown menu allows selection of any age cohort or total population for the x-axis, while the y-axis displays LOR codes. A color legend, using `scaleOrdinal`, encodes Berlin districts, with hover highlighting filtering the displayed circles. Built with React and D3 v5, the SVG chart uses `scaleLinear` for axes and `csv` for data loading from a gist.