都道府県マップ
A choropleth map of Japanese prefectures visualizes the birthplaces of Western-style painters from the Meiji era. Each prefecture is colored according to the number of painters born in a selected year, with a legend mapping values to a white-cyan-red gradient. Users click year labels to update the map's fill colors, with a zoom behavior for navigation. The visualization uses the d3.v3 library, d3.geo.path with a Mercator projection, and reads prefectural border data from 'japan.topojson' and painter data from 'meiji_gaka.csv'. Hovering over a prefecture displays a tooltip with the prefecture name, painter count, and their names.
AI-generated description<b>明治洋画家の出自</b> <br> 笠間日動美術館「日本近代洋画への道」日動出版、2007年 <br>森山秀子・伊藤絵里子「山岡+石橋コレクションでみる洋画家たちの明治」石田大成社、2013年 <br> wikipedia『洋画家』 https://ja.wikipedia.org/wiki/洋画家