Following the principles set down in the London Charter for the Computer-based Visualisation of Cultural Heritage, and out of appropriate respect both to our audience, and also to the seriousness of subject material, we feel it is of the utmost importance to carefully record, reference and document the sources and decisions which went into making the reconstructions presented in the Atlas of Lost Rooms.

Use the drop-down menu ‘SOURCES’ to review the reference information we used in the construction of the Atlas of Lost Rooms.


There is a risk inherent in 3D reconstruction, that due to a consistent level of detail, the audience is lead to believe that all of the evidence that went into the production of the reconstruction is of equal quality, or that all parts of the site have been reconstructed from a consistent level of information.

This is rarely the case in actuality, and was certainly the case in the creation of the Atlas.  For example, photographs may depict one half of the building, but not the other.  From this, we can infer information, such as colour, texture and architectural details about the half of the building not shown, but we cannot be certain. It is therefore imperative that these degrees of uncertainty are communicated to the audience.

We have opted to convey these Levels of Uncertainty (LoUs) visually, in addition to the ‘traditional’ reference material presented in the ‘Sources’ section of this website. 

We have created a colour-graded system to convey the quality of the source material on our digital models.  This is based on a system proposed by Fabrizio Apollonio in his 2016 paper ‘Classification Schemes for Visualization of Uncertainty in Digital Hypothetical Reconstruction‘, adapted to the needed of the Atlas of Lost Rooms and the larger variety of sources we have employed.

The visual key to our LoU models is presented below.  Striped/banded colours represent areas using multiple types of sources.
[Right click the image and open in a new tab for easy reference]