Slides by Benjamin Hennig, Based on a tutorial for the MSc in Social and Spatial Inequalities at the University of Sheffield, Module GEO6016 Data, Visualisation and GIS, October 2009

1. Yet another population cartogram
Creating gridded cartograms
using ArcGIS and ScapeToad
Slides by Benjamin Hennig
Based on a tutorial for the MSc in Social and Spatial Inequalities at the University of Sheffield
Module GEO6016 Data, Visualisation and GIS
October 2009

2. Data
• Population
– Gridded Population of the World
(GPWv3, http://sedac.ciesin.columbia.edu/gpw/)
• Country Shapes
– ESRI Sample Data or
– Global Administrative Boundaries
(http://gadm.org/)

3. GIS works I
• Preparing the grid: Creating a 1° fishnet
ArcToolbox:
 Data Management Tools
 Feature Class
 Create Fishnet

4. GIS works I
• Preparing the grid: Creating a 1° fishnet
ArcToolbox:
 Data Management Tools
 Feature Class
 Create Fishnet

5. GIS works II
Intermediate steps:
• Coverting grid to polygons
(ArcToolbox  Data Management Tools 
Features  Feature to Polygon)
• Adding basedata:
– population raster (gpw_1deg.bil)
– country shapes (countries2007.shp)

6. GIS works IV
• Converting the population raster:
ArcToolbox:
 Conversion Tools
 From Raster
 Raster to Point

7. GIS works IV
• Converting the population raster:
ArcToolbox:
 Conversion Tools
 From Raster
 Raster to Point

8. GIS works V
• Assigning population values to grid:
ArcToolbox:
 Analysis Tools
 Overlay
 Spatial Join

9. GIS works V
• Assigning population values to grid:
ArcToolbox:
 Analysis Tools
 Overlay
 Spatial Join

10. GIS works VI
• Cutting out the continents:
ArcToolbox:
 Analysis Tools
 Overlay
 Intersect

11. GIS works VI
• Cutting out the continents:
ArcToolbox:
 Analysis Tools
 Overlay
 Intersect

12. Cartogram Transformation

13. Cartogram Transformation

14. Cartogram Transformation

15. Cartogram Transformation

16. Cartogram Transformation

17. Cartogram Transformation

18. Cartogram Transformation

19. Cartogram Transformation

20. Final Visualization

21. …well done!
http://www.worldpopulationatlas.org/