Todd Wever, University of Missouri
This map is bizarre because it is a choroplethic cartogram showing the spatial distribution of toothless Americans in the contiguous United States. My data is the “Health Statistics > Oral health > Loss of natural teeth” statistics from statemaster.com and the original state boundaries shapefile is from nationalatlas.gov. The term “toothless” is defined by the source as“adults aged 65+ who have had all their natural teeth extracted”. I created the cartogram using ArcMap9.2 and the Cartogram tool I downloaded from ESRIís website and added to the toolbox. I also had to organize the data from my source in an Excel spreadsheet in order to easily import the values into an attribute table. I added a field to the attribute table of the states shapefile, which contained the values of the toothless population. I then ran the Cartogram tool using the values in this newly created field. The Cartogram tool altered the area of the original states based on the value of toothless population and the original area. I assigned colors and organized the layout in ArcMap9.31. This map uses a North American Albers Equal Area projection and the North American Datum 1983 coordinate system. The standard parallels are 20 degrees and 60 degrees north, and central meridian of 96 degrees west.