Tag Archives: Photogrammetry

DAACH Article

Our article investigating the use of digital techniques to analyse the choir aisles at Wells cathedral has now been published in ‘Digital Applications in Archaeology and Cultural Heritage’. This article is free to view until 7th May 2017 through the following link:

https://authors.elsevier.com/a/1UkLO7szebZ9pb

Abstract

Architectural historians have identified Wells cathedral as a key monument in the transition between high and late Gothic, a move in part characterised by the rejection of simple quadripartite or tierceron rib vaults for more complex vaults. Here we will show how digital methods are used to reopen questions of design and construction first posed in 1841 by pioneer architectural historian Robert Willis. Digital laser scanning documents vaults accurately, thereby establishing their geometries to a high degree of certainty and, at Wells, highlighting differences between the choir aisle bays which have previously been treated as a single design. Significantly, we will show how digital techniques can be used to investigate these differences further, using point cloud data as a starting point for analysis rather than an end point. Thus we will demonstrate how modern technologies have the potential to reignite historic debates and transform scholarly enquiries.

Webb, N., & Buchanan, A. (2017). ‘Tracing the past: A digital analysis of Wells cathedral choir aisle vaults’, Digit. Appl. Archaeol. Cult. Herit., 4, March 2017, pp. 19–27.

eCAADe 2016 – Tracing the Past presentation

At eCAADe 2016 (Education and research in Computer Aided Architectural Design in Europe) in Oulu, Finland, Nick presented a paper co-authored with Alex and JR discussing the advantages of different digital surveying methods for the project. The paper can be found via CUMINCAD here.

A contextualised digital heritage workshop led by Danilo Di Mascio was also organised, with help from Anetta Kepczynska-Walczak and myself, the details of which can be found here. We were very grateful for the support given by the University of Oulu, and were encouraged by the discussions held with participants, which provided an enjoyable couple of days leading up to the main conference. We hope to run the workshop again at eCAADe 2017 in Rome!

file-15-09-2016-20-47-49

Modelling Medieval Vaults Symposium – booking now open

Modelling Medieval Vaults symposium (UoL in London, 14 July 2016, 9:30am—5:00pm)

The University of Liverpool in London, Finsbury Square—Seminar Room 4

Organised by Dr Alex Buchanan and Dr Nick Webb

Tickets can be booked through Eventbrite

Keynote speakers

Professor Santiago Huerta – Technical University of Madrid

Professor Norbert Nußbaum – University of Cologne, with Thomas Bauer and Jörg Lauterbach – Architects and engineers for historic reconstructions, Dresden

Assistant Professor Benjamin Ibarra Sevilla – The University of Texas at Austin

Digital processes

Speakers include:

Dr Danilo Di Mascio – Northumbria University

Dr Nick Webb – University of Liverpool

Dr Rosana Guerra and Dr Paula Fuentes – Technical University of Madrid

Weiyi Pei and Lui Tam – KU Leuven

New questions in 14th-century vaulting

Speakers include:

Dr Alex Buchanan – University of Liverpool

Andrew Budge – Birkbeck College, University of London

The use of digital surveying and analysis techniques, such as laser scanning, photogrammetry, 3D reconstructions or reverse engineering offers the opportunity to re-examine historic works of architecture.

Digital analysis has enabled new research into design processes, construction methods, structural engineering, building archaeology and relationships between buildings. Recent research on Continental European and Central American architecture has established the significance of these techniques, however, as yet there has been little exploitation of digital technologies in the context of medieval architecture in the British Isles. This is despite international recognition of the importance of thirteenth and fourteenth-century English vault design to the history of Gothic architecture in an international context.

The aims of the present symposium are to present new research in this emerging field in order to establish appropriate methodologies using digital tools and identify significant questions for future research in the area.

The symposium will be relevant to anyone with an interest in:

  • Medieval architecture
  • Three-dimensional digital methodologies
  • Digital techniques used for the analysis of historic works of architecture

Symposium cost: £40 for attendees and £25 for students/speakers. Free for student attendees.

Scanning at Exeter Cathedral

On Wednesday 30th March we travelled to Devon to collect more survey data from two sites; Exeter Cathedral and Ottery St Mary Church. We spent two days at Exeter and will spend a final day at Ottery.

IMG_2703

Surprisingly, we were joined by a team at Exeter Cathedral who were also there to create a model of it. Whereas we were using digital scanning techniques to produce a highly accurate model of the vaults at Exeter, they were using Lego to create a scale model within the cathedral. You can follow their progress here. We were able to scan the uninterrupted length of high vaults along the nave and choir, the central porch of the screen facade, the crossing, the miniature vaults in the pulpitum and those of the sedilia. These miniature vaults are particularly interesting to us, being documented designs by Thomas of Witney, a mason who also worked at Wells Cathedral, a site we’ve already scanned. At both Exeter and Wells, Witney experimented with the use of liernes, additional decorative ribs, of which Exeter’s are some of the earliest surviving examples. With help from the cathedral archaeologist, John Allan, we were able to identify additional sites to survey, such as the site of the former North walk of the cloister, which was situated between the external buttressing to the south of the nave.

The trip to Exeter was funded by the University of Liverpool’s Interdisciplinary Network Fund.

Modelling Medieval Vaults – Call for Papers

Modelling Medieval Vaults symposium at the University of Liverpool in London, 14 July 2016.

Through the University of Liverpool’s Interdisciplinary Network Fund we are organising a symposium primarily exploring the use of digital techniques to analyse medieval vaults. The synopsis can be found below and on our events page.

The use of digital surveying and analysis techniques, such as laser scanning, photogrammetry, 3D reconstructions or reverse engineering offers the opportunity to re-examine historic works of architecture. In the context of medieval vaults, this has enabled new research into three-dimensional design processes, construction methods, structural engineering, building archaeology and relationships between buildings.

Recent research on Continental European and Central American vaults has established the significance of these techniques, however, as yet there has been little exploitation of digital technologies in the context of medieval vaults in the British Isles. This is despite international recognition of the importance of thirteenth and fourteenth-century English vault design to the history of Gothic architecture in an international context.

The aims of the present symposium are to present new research in this emerging field in order to establish appropriate methodologies using digital tools and identify significant questions for future research in the area.

Abstracts (500 words maximum) are invited for 20 minute papers on the following subjects:

  • Representation and analysis of medieval vaults using digital technologies.
  • Investigations of British tierceron, lierne or fan vaults.
  • Digital techniques used for the analysis of historic works of architecture applicable to gothic vaulted buildings.

Our intention is that proceedings will be published in a suitable journal.

Deadline for abstracts: Friday 13th May 2016

Enquiries and abstracts to be addressed to Nick Webb email.

Symposium date: Thursday 14th July 2016

Location: The University of Liverpool in London, Finsbury Square.

 

Digital Past 2016

On 10th and 11th February 2016 Nick attended Digital Past 2016, an annual conference organised by the Royal Commission on the Ancient Monuments of Wales focussing on the use of digital tools and techniques in the context of heritage assets.

Projects linked closely to the vaults research were particularly informative, for example Dr Maurice Murphy’s use of laser scan data in conjunction with Historic Building Information Modelling (HBIM) to serve as conservation and analysis documents. In the context of the vaults project, we are keen to investigate the use of HBIM to assist in our continuing analysis of the geometry of medieval vaults, which is very complex in terms of the amount of geometric data gathered. An Irish government funded project 3D-Icons was very revealing in terms of the processes required to create accessible digital models of significant monuments and buildings. For example, converting laser scan data to mesh models with rendered textures, and finally making these easily viewable to the public.

The conference presented a number of other intriguing projects, for example Professor Bob Stone’s use of drones and immersive virtual reality to inspire communities to engage with local histories, as well as the use of Gigapixel photography to document Welsh chapels and make available the interactive views online. The Cynefin project to digitise Tithe maps showed how Gigapixel photography can be used to copy large and delicate maps without damaging the original, and their consequent overlay with modern digital maps to provide a free resource for the public and researchers to use.

The conference was a great success and we look forward to returning next year, where we hope to present an update of the vaults project.

Scanning at Nantwich St Mary’s Church

On Friday 13th November 2015 we visited Nantwich St Mary’s to scan the medieval vaults in the choir, as well as the intriguing reconstructed vaults in the crossing by George Gilbert Scott. Below is a timelapse video showing the laser scanner in action in the choir operated by Nick, whilst J.R. records the vaults for photogrammetry purposes, and Alex provides a short guided tour of the sculpture on the misericords in the medieval choir stalls.

Even with the timelapse speed, the rotation of the scanner seems slow. The individual scan provides a point cloud model of the architecture immediately around it, which when combined with other scans, gives a highly detailed and accurate point cloud of the entire vaults in the choir. The next stage of the process will be to interpret the data using a number of digital modelling techniques in order to provide a better understanding of the underlying vault geometry.