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Fig. 2 | Heritage Science

Fig. 2

From: The origins of the Selden map of China: scientific analysis of the painting materials and techniques using a holistic approach

Fig. 2

A detail of the Selden map (before the 2011 conservation treatment) showing the compass rose with its 24 divisions, the ruler (or scale bar) and the empty frame (thought to be a miniature of the map to guide the position of the ruler and the compass directions taking into account of the magnetic declination). © The Bodleian Library, University of Oxford, MS Selden Supra 105

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