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Own work based on Chicago_violent_crime_map_weighted.svg by Peterfitzgerald and Map_-_NL_-_Amsterdam_-_Stadsdeel_Binnenstad_-_Buurt_00_Burgwallen-Oude_Zijde.svg by Michiel1972
Globe-trotter, 



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Attribution: Bron: © 2008, Centraal Bureau voor de Statistiek / Topografische Dienst Kadaster
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