1. East Anglia Fenlands
mashup since Domesday
Andrew Zolnai
Cambridge UK
blog.zolnai.ca

2. Basic Information
• HC Darby
– 1969, The Draining of the Fens (35 maps figures)
– 1974, The Medieval Fenland (25 maps figures)
• PJ Smith
– 1994, Grahame Clark, the Fenland Research
Committee and prehistory at Cambridge
• J Bowring
– In prep. (population maps of the Fenland from
1563 and 1674)

3. Lay Subsidy Maps

4. Constants
• Scanned figures
– Parish boundaries
• O|S OpenData
– Cities
– Coastlines
– County boundaries
– Parish boundaries

5. Derivations
Lay Subsidy year 1327 1332 1641
assess. "20th" "15th"
criteria 1/20 1/15 /1000 acre /500 acre
Darby 15 20 30 15
classif. 30 40 60 30
values 45 60 90 45
original 15 20
derived 23 30
used 38 50
Lay Domesday
Classification Subsidy SurfGeol R G B Bowring
0 0 155 155 155 =0
1 1 0 0 255 0 - 10
3 2 155 0 255 10 - 25
4 3 255 0 255 25 - 50
6 4 255 0 0 > 50

6. Current
• OpenData
• BGS WMS
– Onshore
– Offshore

7. Tracking economic wealth

8. Overlaying surficial geology

9. Vector maps online

10. Questions?
• Thank you
– archaeogeek.com and giscloud.com
– Cambridge University, Cont. Ed. / Archaeology
– Ordnance Survey, OpenData / OpenSpace
– British Geological Survey, Web Mapping Service
• More info
– Web map: http://bit.ly/cQw2nU
– Project blog: http://bit.ly/9wgr6R
– Public data: http://bit.ly/8YTk4K