Landscape architecture is presently undergoing a technical revolution; computers are increasingly being Landscape architecture is presently undergoing a used to store, manipulate and display regional information. Computer software used by landscape architects is generally still limited but one program, IMGRID, developed at Harvard University Graduate School of Design by David Sinton, is unusually powerful and adaptable. One major drawback does exist with this program; capability for statistical manipulation of data is very limited. Consequently, this creative project develops additional algorithms which give an enhanced version of IMGRID (IISIS) that statistical capability. Statistical procedures added include a complete range of descriptive statistics and multiple correlation and regression. The IISIS user may invoke these procedures by use of a new key word STAT. A description of the options and new algorithms are given along with an example of their use. / Department of Landscape Architecture