Public domain
Geometric Plan of a Bastion
From the collection of Rijksmuseum, Amsterdam. Free to download, adapt and use — no permission needed.
About this work
A geometric plan of a bastion, drawn on the left according to the rules of perspective (rules of dioptrics) and on the right using a graphometer. Top right, marked: Planche VI. This print is part of the book: A.G. Eckhardt, Description of a General Graphometer, 1778.
Rijksmuseum, Amsterdam’s own descriptionCredit lineGeometrisch plan van een bastion. 1778. Carel Jacob de Huyser. Rijksmuseum, Amsterdam. Public domain.