© Factum Foundation
In 2019, the Biblioteca Marciana started a project concerning a new philological edition of the Heart-shaped map of Hajji Ahmed, involving the memoranda of understanding between the Venetian institutes of IUAV University and the Academy of Fine Arts. In February 2019, Factum Foundation collaborated with the IUAV CIRCE Photogrammetry Lab to record the original cherry-wood printing blocks in high-resolution. The recording was part of an initiative led by ARCHiVe (Analysis and Recording of Cultural Heritage in Venice), and was framed as a comparative study designed to assess the merits of three recording techniques: photogrammetry, laser scanning, and the Lucida 3D Scanner.
The photogrammetric survey was conducted using a Nikon D800 reflex with a 50mm lens, with the data processing employing the Agisoft Metashape Pro Software. A Range 7 triangulation laser scanner, employing both a telephoto lens and a wide angle lens (precision ± 40 microns), was then used to re-record the map. Alignment for the laser scanner was performed using Geomagic Studio software. Finally, the map was recorded with the Lucida 3D Scanner, which is designed for the acquisition of 3D information from objects with an almost flat surface, such as paintings or bas-reliefs. At the end of the investigation, a section (10 x 10 cm) of the data collected from the different systems was printed in 3D. The information acquired through the Lucida Scanner was found to be the most suitable for the purposes of creating a faithful copy of the product.
The scanned data was CNC milled and new printing blocks have been produced, from which one copy of the map has been made.
A sample of the 3D data captured by the Lucida. © Factum Foundation
The recreated woodblocks during printing tests, in Factum Foundation's printing department © Oak Taylor Smith for Factum Foundation
Detail of the printed edition © Oak Taylor Smith for Factum Foundation
Thanks to the data acquired by the Lucida Scanner, it is now possible to use it as a base for digital restoration. Factum Foundation is now working in collaboration with the Biblioteca Marciana and the IUAV University to reproduce a facsimile of the ‘restored’ map. The blocks which make up the matrix of the Ottoman-Venetian map have deteriorated considerably since they were first made, and there are several gaps in the map; using the scan data, in fact, it is possible to propose restoration options for several of these gaps, leading to a more complete 3D model, and allowing conservators to identify the most appropriate actions to take in order to conserve the original object.
Sponsoring a further new edition of the map is the Kingdom of Saudi Arabia, which aims to support the Biblioteca thanks to the ‘Associazione Amici della Marciana’ in promoting the museum’s cartographic works.
The copy of the Mappa Turchesca printed from the recreated woodblocks © Oak Taylor Smith for Factum Foundation
The recreation of the woodblocks of the Mappa Turchesca and the print made from the blocks (left) alongside two enlarged pages from the Martirologio di Ferrara (right), made for the exhibition 'Mindful Hands' at the Fondazione Giorgio Cini. In the glass case at the centre of the room there are facsimiles of two Canova sketchbooks and the miniature Offiziolo di Carlo VII © Paolo Righi for Genus Bononiae
We thank Mario Costa and Fabio Martinello, students from the Master of Digital Architecture who have interned at ARCHiVe in Venice and Factum Foundation in Madrid, for their participation in the project.