In 1964, Berry, then an assistant professor at the University of Chicago, published a paper in the Annals of the Association of American Geographers calling for a new approach to the accumulation of spatial data. To reconcile regional and systematic analysis, he proposed the creation of a matrix of spatial information. This matrix would be comprised of rows of data that dealt with a particular measurable variable, and columns that consisted of data pertaining to a uniform location. The cells created by the intersection of the rows and columns would represent a “”geographic fact”” for a given variable and location.