standarized chlorpleth map

The image is a standardized chloropleth map of Canada that shows the amount of children 14 years or younger. In this type of map , the data is divided typically in terms of the area or a related area variable to allow comparison of the phenemom . This image uses the shade and lightness of a green hue in direct relationship to a numeric value to graphically illustrate the data.
Image found at :http://http://www.google.com/imgres?imgurl=http://www.statcan.gc.ca/pub/92f0138m/2008003/figures/figure3.1-en.jpg&imgrefurl=http://www.statcan.gc.ca/pub/92f0138m/2008003/figures/5200001-eng.htm&usg=__LwfMIXP6xqMcKs73DRmozwwQX3g=&h=620&w=850&sz=318&hl=en&start=0&sig2=UptI2raedXdmcSPU2Cuorg&tbnid=CVFlvJdZBdf_YM:&tbnh=151&tbnw=207&ei=L31TTMXCEsP88AbWocWCAw&prev=/images%3Fq%3Dstandarized%2Bchlorpleth%2Bmaps%26hl%3Den%26biw%3D1276%26bih%3D579%26gbv%3D2%26tbs%3Disch:1&itbs=1&iact=hc&vpx=142&vpy=224&dur=1077&hovh=192&hovw=263&tx=108&ty=131&page=1&ndsp=10&ved=1t:429,r:0,s:0