DCEG investigators study geographic patterns and temporal trends in cancer incidence and mortality rates to generate etiologic hypotheses, evaluate consistency with other hypotheses, and identify cancer sites warranting special study. DCEG published a U.S. atlas of cancer mortality data spanning the years 1950 to 1994, which identified geographic areas with high rates of specific cancers and spatial and temporal patterns that may suggest particular carcinogenic exposures.
The atlas was subsequently developed into an interactive website, and was updated over the years. In 2016, the historical cancer mortality data was migrated to the NCI GeoViewer, a mapping tool designed to enable researchers to create maps of cancer statistics, demographics, and risk factors. Read more about the evolution of the cancer mortality tools.