Maps & AtlasesExtensive regional, historical maps, including: Panoramic and Birds-eye views; Surveyor's notes and plat maps; WI exploration and economic, land ownership, and reference maps; and Kaysen Railroad Maps. WHS is currently digitizing its collection of Sanborn Perris Insurance maps; Superior Sanborn maps from 1887, 1889, 1892, and 1914 have already been digitized and are available.