German geographer, cartographer and map publisher, active primarily in Berlin in the second half of the nineteenth century.
Trained in geography and mathematics, he is best known for devising the Oenike projection, an equal-area pseudocylindrical map projection developed for the clear and balanced representation of the world, particularly suited to thematic and educational mapping. Oenike operated as a publisher and lithographer, producing wall maps, school maps and atlases that combined scientific rigour with practical legibility, reflecting contemporary advances in geographical knowledge and cartographic technique. His work was widely used in German educational institutions and contributed to the broader nineteenth-century movement towards more systematic, mathematically grounded cartography.