1 United States Mean Population Center, 1790-2000 http://www.census.gov/geo/www/cenpop/calculate2k.pdf.]]> Animation (1024x512) This animation shows the mean population center of the United States for each census from 1790-2000. 1 0 1790-01-01 2010-01-01 1790 1 1 1790-01-01 1800-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0001.png 22 52 -126 -66 1800 1 1 1800-01-01 1810-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0002.png 22 52 -126 -66 1810 1 1 1810-01-01 1820-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0003.png 22 52 -126 -66 1820 1 1 1820-01-01 1830-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0004.png 22 52 -126 -66 1830 1 1 1830-01-01 1840-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0005.png 22 52 -126 -66 1840 1 1 1840-01-01 1850-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0006.png 22 52 -126 -66 1850 1 1 1850-01-01 1860-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0007.png 22 52 -126 -66 1860 1 1 1860-01-01 1870-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0008.png 22 52 -126 -66 1870 1 1 1870-01-01 1880-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0009.png 22 52 -126 -66 1880 1 1 1880-01-01 1890-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0010.png 22 52 -126 -66 1890 1 1 1890-01-01 1900-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0011.png 22 52 -126 -66 1900 1 1 1900-01-01 1910-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0012.png 22 52 -126 -66 1910 1 1 1910-01-01 1920-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0013.png 22 52 -126 -66 1920 1 1 1920-01-01 1930-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0014.png 22 52 -126 -66 1930 1 1 1930-01-01 1940-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0015.png 22 52 -126 -66 1940 1 1 1940-01-01 1950-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0016.png 22 52 -126 -66 1950 1 1 1950-01-01 1960-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0017.png 22 52 -126 -66 1960 1 1 1960-01-01 1970-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0018.png 22 52 -126 -66 1970 1 1 1970-01-01 1980-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0019.png 22 52 -126 -66 1980 1 1 1980-01-01 1990-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0020.png 22 52 -126 -66 1990 1 1 1990-01-01 2000-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0021.png 22 52 -126 -66 2000 1 1 2000-01-01 2010-01-01 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/popmean0022.png 22 52 -126 -66 Background Image 0 0 http://svs.gsfc.nasa.gov/vis/a000000/a003100/a003163/frames/1024x512/background-bluemarble-unitedstates.png 22 52 -126 -66