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Spatial Analysis of East AnglianAnglo Saxon Archaeology<br />Edward Kemp<br />MSc Applied Geographical Information Systems...
Presentation Structure<br />Provide a background to the project.<br />Explain the projects aims and objectives.<br />Intro...
Background<br />Dissertation topic inspired by a project from 2006 by John Naylor at Ashmolean Museum in Oxford<br />Uses ...
Aims and Objectives<br />Explore archaeological data using spatial analysis techniques<br />Explore distributions and patt...
Study Area<br />
Preparing PAS Data<br />Remove inconstancies in data<br />Remove any unclassified or incomplete items<br />Object types as...
Assigning Categories<br />Object groups and time periods were assigned to each item<br />One of six object groups were ass...
Spatial Analysis Techniques<br />Average Nearest Neighbour:<br />Compare the distance between feature locations<br />Globa...
Average Nearest Neighbour Findings<br />Results gave an insight into the distribution of some object groups<br />Overall f...
Global Morans I Findings<br />Provided slightly different picture<br />Finds again showed less tendency to cluster of time...
Getis –Ord G* Hotspot Analysis Findings<br />No statistically significant cold spots were found<br />Significant hotspots ...
All <br />Coin Finds<br />
Commercial <br />and Household<br />Late Period<br />Finds<br />
Possible trade<br />routes<br />
VASLE Productive Site (VPS) Analysis<br />Aim to assess the productivity of the 22 VPS using buffering and intersection fu...
22 VPS<br />+ 2.5 mile buffers<br />
VASLE Productive Site (VPS) Buffer Analysis Results<br />7 out of 22 sites were deemed to be productive as a result of the...
Conclusions – Did we achieve out objectives?<br />Spatial analysis techniques can be successfully used in conjunction with...
THANK YOU <br />FOR LISTENING<br />ANY QUESTIONS?<br />
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Masters Dissertation - Presentation

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Masters Dissertation - Presentation

  1. 1. Spatial Analysis of East AnglianAnglo Saxon Archaeology<br />Edward Kemp<br />MSc Applied Geographical Information Systems <br />Wednesday 7th September 2011<br />
  2. 2. Presentation Structure<br />Provide a background to the project.<br />Explain the projects aims and objectives.<br />Introduce the study area and data.<br />Briefly explain the methods used.<br />Share some results and conclusions.<br />Did we achieve our objectives?<br />I mages from: Culture 24 www.culture24.org.uk<br />
  3. 3. Background<br />Dissertation topic inspired by a project from 2006 by John Naylor at Ashmolean Museum in Oxford<br />Uses of an online database of archaeological finds found using metal detectors by members of the public<br />Started in 1997 now has over 450,000 unique objects on the searchable database<br />Run by the Portable Antiquities Scheme (PAS) in conjunction with the British Museum <br />
  4. 4. Aims and Objectives<br />Explore archaeological data using spatial analysis techniques<br />Explore distributions and patterns in the data with the aim of better understanding the development of Anglo Saxon East Anglia<br />Assess the ‘productivity’ (level/type of activity) at previously identified archaeological sites using spatial analysis techniques and the PAS database<br />Combine the results highlighting areas that could be investigated further through fieldwork or additional spatial analysis<br />
  5. 5. Study Area<br />
  6. 6. Preparing PAS Data<br />Remove inconstancies in data<br />Remove any unclassified or incomplete items<br />Object types assigned object groups<br />Finds assigned a period in Anglo Saxon history<br />Plotted using easting and northing grid references<br />
  7. 7. Assigning Categories<br />Object groups and time periods were assigned to each item<br />One of six object groups were assigned to each item:<br />Clothing (buckle, hooked tag, sleeve clasp)<br />Coins (single coins, ingots)<br />Horse Items (stirrup, strap ends, bridle bit, harness mount)<br />Commercial and Household: (spoon, bowl, tweezers, hinge, gaming piece)<br />Jewellery (brooch, ring, bracelet, bead, armlet)<br />Pins (hair pin, linked pin)<br />One of three time periods were also assigned to each item:<br />Early: 400 – 600AD<br />Middle: 601 – 800AD<br />Late: 801 – 1066AD<br />Each object group was broken down further by time period<br />
  8. 8. Spatial Analysis Techniques<br />Average Nearest Neighbour:<br />Compare the distance between feature locations<br />Global Morans I:<br />Compares the distance between feature values<br />Are similar or dissimilar values clustering<br />Getis – Ord G* Hotspot Analysis:<br />Identifies whether features with high values or features with low values tend to cluster together in a study area(forming ‘hot’ or ‘cold’ spots)<br />All results were accompanied by a level of significance <br />Either 99%, 95% or 90%<br />Use to accept or reject the null hypothesis<br />Points/ values were located as a result of a random process<br />
  9. 9. Average Nearest Neighbour Findings<br />Results gave an insight into the distribution of some object groups<br />Overall finds showed less tendency to cluster over time <br />Jewellery items showed the highest tendency to cluster<br />Commercial and household items the least<br />Both at a 99% confidence level<br />
  10. 10. Global Morans I Findings<br />Provided slightly different picture<br />Finds again showed less tendency to cluster of time <br />Clothing items showed the highest tendency to cluster at a 99% confidence level<br />Commercial and household the least but with no confidence level attached<br />
  11. 11. Getis –Ord G* Hotspot Analysis Findings<br />No statistically significant cold spots were found<br />Significant hotspots move around the study area over time<br />The central area around the town of Hoxne seems to be important in the early – middle period<br />The shift is then to the north and west of Norfolk<br />Patterns in two of the maps indicate possible trade or communication routes – aid of underlying OS map<br />One running from the VASLE site at Freckenham NE to Great Yarmouth and the other running SE to Felixstowe<br />
  12. 12. All <br />Coin Finds<br />
  13. 13. Commercial <br />and Household<br />Late Period<br />Finds<br />
  14. 14. Possible trade<br />routes<br />
  15. 15. VASLE Productive Site (VPS) Analysis<br />Aim to assess the productivity of the 22 VPS using buffering and intersection functions<br />No specific definition of what a productive site is so buffer size and criteria were based on the 2006 project:<br />2.5 mile buffer chosen because of:<br />Dispersed settlement pattern<br />Increased distribution through trade as time goes on<br />Take into account disposal and accidental loss<br />Productivity would be assessed by counting the number of object groups and time periods returning above average numbers of finds from the PAS dataset<br />More than 4 out 6 object groups AND 2 out of 3 time periods and the VPS would be deemed productive throughout the Anglo Saxon period<br />
  16. 16. 22 VPS<br />+ 2.5 mile buffers<br />
  17. 17. VASLE Productive Site (VPS) Buffer Analysis Results<br />7 out of 22 sites were deemed to be productive as a result of the spatial analysis process<br />Gave an indication as to when some sites developed <br />Gave an indication of each sites primary function <br />Pin manufacture, tax and trade.<br />Timings for the possible trade routes could be given, northern route earlier, southern route later<br />
  18. 18. Conclusions – Did we achieve out objectives?<br />Spatial analysis techniques can be successfully used in conjunction with complex archaeological data <br />Patterns are revealed that can tell a story about a town or area<br />These would not be apparent using purely visual inspection<br />Each technique complimented each other<br />The project has set the scene for future possible GIS projects <br />
  19. 19. THANK YOU <br />FOR LISTENING<br />ANY QUESTIONS?<br />

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