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Creating gridded cartograms: Israel and the Palestine Territories
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Creating gridded cartograms: Israel and the Palestine Territories

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Presentation made by Benjamin Hennig based on a tutorial given at the University of Sheffield for the MSc in Social and Spatial Inequalities, Module GEO6016 Data, Visualisation and GIS, October ...

Presentation made by Benjamin Hennig based on a tutorial given at the University of Sheffield for the MSc in Social and Spatial Inequalities, Module GEO6016 Data, Visualisation and GIS, October 2010.
http://www.viewsoftheworld.net/

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    Creating gridded cartograms: Israel and the Palestine Territories Creating gridded cartograms: Israel and the Palestine Territories Presentation Transcript

    • Israel & the Palestine TerritoriesGIS Tutorial by Benjamin HennigFor the MSc in Social and Spatial Inequalities at the University of SheffieldModule GEO6016 Data, Visualisation and GIS | http://sasi.group.shef.ac.uk/
    • The following tutorial will talk you through the main stepsnecessary to create a basic grid-based population cartogram fora selected area.The main data preparation is done using ESRI ArcMap, thecartogram transformation is performed in ScapeToad which usesa simplified approach of Gastner/Newmans density equalisingcartogram algorithm.For technical details and further reading see:Hennig, B.D., Pritchard, J., Ramsden, M., and Dorling, D. (2010).Remapping the World’s Population. Visualizing data usingcartograms. ArcUser 2010 (1), 66-69.Article as PDF at http://www.viewsoftheworld.net/?p=701
    • DataPopulation• Gridded Population of the World (GPWv3, http://sedac.ciesin.columbia.edu/gpw/)  provided as raster image worldpop2015.imgCountry Shapes• ESRI Sample Data or  provided as vector data world.shp• Global Administrative Boundaries (http://gadm.org/)• ...
    • GIS works IPreparing the area of interest: Extracting features Open world.shp Select Israel and the Palestine Territories via the selection menu (or the tools bar) Right-click the world layer and choose the Data – Export data option to create a new layer with the selected polygons
    • GIS works IIPreparing the grid: Creating a 2.5‘‘ fishnet ArcToolbox:  Data Management Tools  Feature Class  Create Fishnet
    • GIS works IIPreparing the grid: Creating a 2.5‘‘ fishnet ArcToolbox:  Data Management Tools  Feature Class  Create Fishnet Converting grid lines to polygons (ArcToolbox  Data Management Tools  Features  Feature to Polygon)
    • It should work…but it doesn’t? Check the extent – Is it what you want?
    • GIS works IVAdding and adjusting basedata:• population raster (worldpop2015.img)• ArcToolbox:  Data Management Tools  Raster  Raster Processing  Clip)
    • GIS works IVAdding and adjusting basedata:• population raster (worldpop2015.img)• ArcToolbox:  Data Management Tools  Raster  Raster Processing  Clip)Converting the population raster: ArcToolbox:  Conversion Tools  From Raster  Raster to Point
    • GIS works VAssigning population values to grid: ArcToolbox:  Analysis Tools  Overlay  Spatial Join
    • GIS works VICutting out the area of interest: ArcToolbox:  Analysis Tools  Overlay  Intersect
    • Creating the cartogram using ScapeToad
    • 1, 2, 3 – as easy as that!
    • …well done  http://www.worldpopulationatlas.org