Slides delivered at GISRUK 2013 in Liverpool, UK

1. Community Mapping As A Socio-
Technical Work Domain
Mark Iliffe, Robert Houghton and
Jeremy Morley

2. Break It Down

3. Community Mapping
“local mapping, produced collaboratively, by
local people and often incorporating alternative
local knowledge” - Perkins 2007

4. Tandale, August 2011
(c) OpenStreetMap contributors, CC-BY-SA

5. (c) OpenStreetMap contributors, CC-BY-SA

7. http://www.flickr.com/photos/markiliffe/6147128797

8. Measuring VGI Data Quality
Quality Metric Countries References
Completeness England, Germany, Haklay (2010), Koukoletsos et al. (2012),
France, Haiti Zelestra and Zipf (2010),
Girres and Touya (2011), Koukoletsos (2012)
Logical France Girres and Touya (2011)
Consistency
Positional England, Germany, Haklay (2010), Zelestra and Zipf (2010), Neis et al.
Accuracy France, Haiti (2012), Girres and Touya (2011), Koukoletsos (2012)
Thematic France, Haiti Girres and Touya (2011), Koukoletsos (2012)
Accuracy
Temporal France Girres and Touya (2011)
Accuracy
Usage and France Girres and Touya (2011)
Purpose

9. Definitive Total Length 4,728,128.50m
OSM Total Length 4,319,135.92m
Discrepancy 408,992.58m (8.65%)

10. HOW DO YOU MEASURE QUALITY
WHEN THERE IS NO COMPARATIVE
DATASET?

11. Work Domain Analysis
• Understand the system with a holistic
approach, not just what happens, but what
are the drivers and ‘values’ of the system to
the physical objects.
– Rassmussen et. al (1994) and Vicente (1999)

16. Future Work
• Thematic Mapping, understand the quality
attributes and methodologies of Thematic
Quality
• “Go all the way” with Work Domain Analysis
– Getting past first base: Going all the way with
Cognitive Work Analysis, McIlroy, R and
Stanton, N. Applied Ergonomics (2011),

17. References
• Getting past first base: Going all the way with Cognitive Work Analysis, McIlroy, R
and Stanton, N. Applied Ergonomics (2011)
• Perkins, C. (2007). Community Mapping. The Cartographic Journal, 44(2), 127–137.
• Rasmussen, J., Pejtersen, A., Goodstein, L.P., 1994. Cognitive Systems Engineering.
Wiley, New York.
• Vicente, K.J., 1999. Cognitive Work Analysis: Toward Safe, Productive, and Healthy
Computer-Based Work. Lawrence Erlbaum Associates, Mahwah, NJ.
• Haklay, M. (2010). How good is volunteered geographical information? A
comparative study of OpenStreetMap and Ordnance Survey datasets. Environment
and planning B: Planning and design, 37(4), 682–703.
• Girres, J.-F., & Touya, G. (2010). Quality Assessment of the French OpenStreetMap
Dataset. Transactions in GIS, 14(4), 435–459.
• Neis, P., Zielstra, D., & Zipf, A. (2012). The Street Network Evolution of
Crowdsourced Maps: OpenStreetMap in Germany 2007–2011. Future Internet, 1–
21. doi:10.3390/fi4010001
• Koukoletsos, T. et al. (2012). A Framework for Quality Evaluation of VGI linear
datasets. University College London.