Elevation and population density 1900/1950 - 2010 maps

For my thesis I included several figures showing the elevation and population density over time from the countries the Netherlands, Japan and the United States. It may come as no surprise that the images show most urbanization over the past 60 or 110 years has taken place in the floodplains. 

Map of the Topography and Population Density of the Netherlands (1900, 2010) in people per square kilometer. (Adapted from the Actueel Hoogtebestand Nederland, 2014; Nieuwe Rotterdamsche Courant, 2014; Centraal Bureau voor de Statistiek, 2010).

Map of the Topography and Population Density of Japan (1950, 2010) in people per square kilometer. (Adapted from the Generic Mapping Tools, 2013a; Statistics Bureau, Ministry of Internal Affairs and Communication (MIC), 2011; Statistics Bureau, Ministry of Internal Affairs and Communications (MIC), 2014).

Map of the Topography and Population Density of the continental United States (1900, 2010) in people per square kilometer. (Adapted from the Generic Mapping Tools, 2013b; United States Census Bureau, 2013a; United States Census Bureau, 2013b).

Images adapted by Daniël Vrielink (2014).

Full references:
Netherlands

• Actueel Hoogtebestand Nederland. 2014. AHN Viewer. Retrieved June 22, 2014 http://ahn.geodan.nl/ahn/ (This sub-site does not work anymore but there is information on the open data here: http://www.ahn.nl/pagina/open-data.html)
• Centraal Bureau voor de Statistiek. 2010. Bevolkingsdichtheid 2010. Retrieved June 22, 2014 from http://i.imgur.com/0W58Ejn.png
• Nieuwe Rotterdamsche Courant. (n.d.). Bevolkingsdichtheid rond 1900 [Population density around 1900]. Retrieved June 22, 2014. http://retro.nrc.nl/W2/Lab/Profiel/1900/volk00-370.gif A Dutch national newspaper has cataloged various information from 1900 in several maps here: http://retro.nrc.nl/W2/Lab/Profiel/1900/

Japan

• Generic Mapping Tools. (2013a). [Japan GMT topographical map]. Retrieved June 10, 2012 from http://gmt.soest.hawaii.edu/projects/gmt
• Statistics Bureau, Ministry of Internal Affairs and Communication (MIC). (2011). Statistical Maps of Japan, 2010 population census of Japan. Retrieved June 5, 2012 from http://www.stat.go.jp/data/chiri/map/c_koku/mitsudo/pdf/2010.pdf
• Statistics Bureau, Ministry of Internal Affairs and Communications (MIC). (2014). Population by prefecture (1920-2012). Retrieved May 3, 2014 from http://www.stat.go.jp/data/nenkan/zuhyou/y0203000.xls (downlodable through http://www.stat.go.jp)

United States

• Generic Mapping Tools. (2013b). [USA GMT topographical map]. Retrieved June 10, 2012 from http://gmt.soest.hawaii.edu/projects/gmt
• United States Census Bureau. (2013a). Population Density by State: 1900. Retrieved June 21, 2014 from http://www.census.gov/geo/maps-data/maps/pdfs/thematic/pop_density_1900.pdf
• United States Census Bureau. (2013b). 2010 Census Results - United States and Puerto Rico. Retrieved June 22, 2014 from http://www.census.gov/geo/mapsdata/maps/pdfs/thematic/us_popdensity_2010map.pdf