In 1927 Imhof was tasked with revising the Schweizerischer Mittelschulatlas, the atlas used in Swiss high schools. All editions of the Schweizerischer Mittelschulatlas published from 1932 until 1976 were under his direction. The Swiss primary school atlas, the Schweizerischer Sekundarschulatlas, published between 1934 and 1975, were also produced under his direction.
