Abstract
Abstract. Parametric modelling approach applied to cultural heritage virtual representation is a field of research explored for years since it can address many limitations of digitising tools. For example, essential historical sources for fortification virtual reconstructions like plans-reliefs have several shortcomings when they are scanned. To overcome those problems, knowledge based-modelling can be used: knowledge models based on the analysis of theoretical literature of a specific domain such as bastioned fortification treatises can be the cornerstone of the creation of a parametric library of fortification components. Implemented in Grasshopper, these components are manually adjusted on the data available (i.e. 3D surveys of plans-reliefs or scanned maps). Most of the fortification area is now modelled and the question of accuracy assessment is raised. A specific method is used to evaluate the accuracy of the parametric components. The results of the assessment process will allow us to validate the parametric approach. The automation of the adjustment process can finally be planned. The virtual model of fortification is part of a larger project aimed at valorising and diffusing a very unique cultural heritage item: the collection of plans-reliefs. As such, knowledge models are precious assets when automation and semantic enhancements will be considered.
Highlights
In 2008, twelve fortified sites of Vauban were added to the Unesco World Heritage List thanks to their “outstanding universal value”
The further the works are from the city, the more difficult their parametric modelling become
Bastioned fortification treatises give us access to the knowledge required to implement a parametric library prototype of fortification components
Summary
In 2008, twelve fortified sites of Vauban were added to the Unesco World Heritage List thanks to their “outstanding universal value”. In addition to these preserved strongholds, hundreds of sites were fortified by the French marshal. A testimony of these fortified places is the collection of plansreliefs These scale models are a perfect support to understand the dimensional realities and the urban impact of fortification throughout history. As a result, they are the primary source for any 3D project of fortification sites modelling. As a matter of fact, the characteristics of the collection are exceptional
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