Dunwich, Suffolk: Mapping and assessing the inundated medieval town

Project 5833

By David Sear, Andy Murdock, Tim LeBas, Paul Baggaley, Gemma Gubbins

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The report, commissioned as part of the National Heritage Protection Plan provides mapping, survey data, and interpretations to allow further progress towards designation of the submerged Dunwich town site.

With funding from English Heritage, the project was realised through the collaboration of the Geodata Institute, the National Oceanography Centre and Wessex Archaeology.

Contents

  • 1 Aim and Objectives
    1.1 Project Aim
    1.2 Project Objectives 
    2.0 Background
    2.1 Context
    2.2 Site Selection 
    2.3 Previous Work 
    2.4 Historical background to Dunwich site
    3 Methodology (Objective 4)
    4 Historical Analysis methods and data sources (Objective 1) 
    4.2 Historic maps and nautical charts - the data sources
    4.3 Sea Atlases
    4.4 Sailing directions
    4.5 Perspective views
    4.6 Historic Ordnance Survey Mapping
    4.7 Historic Aerial Photography 
    4.8 Historic paintings, pictures and descriptions
    4.9 Changes to the City of Dunwich identified from mapping
    5 Geophysical data collection 2012 
    5.2 AIMS AND OBJECTIVES 
    5.3 GEOPHYSICAL DATA - TECHNICAL SPECIFICATIONS 
    5.4 GEOPHYSICAL DATA-PROCESSING 
    5.5 Empirical Tidal corrections & MBES Processing
    5.6 Magnetometer GEOPHYSICAL DATA - ANOMALY GROUPING AND DISCRIMINATION 
    5.7 Sidescan data processing 
    5.8 Diver held DIDSON surveys 2010-2012 
    5.9 DIDSON Processing
    6 Data Synthesis
    6.1 MAGNETOMETRY RESULTS 
    6.2 Northern Survey Area
    6.3 St. Peter's Church Survey Area 
    6.4 St. Nicholas' Church Survey Area 
    6.5 Identification of new marine archaeology
    6.6 DIDSON Surveys (Objective 3)
    6.7 Geophysical Survey Site scale results 
    6.8 St Peter's Church (Appendix 3, Figures 3.1A-H) 
    6.9 St Peters Church New Site
    6.10 St Nicholas Church 
    6.11 Blackfriars Friary 
    6.12 Blackfriars New 
    6.13 St Katherine's Chapel Evaluation
    6.14 Evaluation of the application of different geophysical techniques for site scale investigation at Dunwich Town site
    6.15 Summary Evaluation
    7 Analysis of heritage risk (Objective 5)
    7.2 Bathymetric Change Analysis (BCA)
    7.3 Data Conversion
    7.4 Data Standardisation
    7.5 Synoptic Bathymetric Change 
    7.6 Site Scale historic changes in seabed Bathymetry
    7.7 Sediment Mobility and seabed topography around Individual ruins
    7.8 Summary and Risk to the marine heritage
    7.9 Site Extent and Reconstruction (Objective 2)
    8 Project Summary 
    8.2 Extent of Site 
    8.3 Evaluation of approach 
    8.4 Further analysis
    9 Bibliography 

Additional Information

  • Publication Status: Completed

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