
250px|thumb|right|A panoramic image of Kyiv, [[Ukraine (circa 1870–1880) using the zincographic process.]]
250px|thumb|right|A panoramic image of Kyiv, [[Ukraine (circa 1870–1880) using the zincographic process.]]
Zincography was a planographic printing process that used zinc plates. Alois Senefelder first mentioned zinc's lithographic use as a substitute for Bavarian limestone in his 1801 English patent specifications. In 1834, Federico Lacelli patented a zincographic printing process, producing large maps called géoramas. In 1837–1842, Eugène-Florent Kaeppelin (1805–1865) perfected the process to create a large polychrome geologic map.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).