by Meg E. Stewart
Originally Published September 25th, 2006
By now most in academia know of GIS, especially those reading an online journal discussing digital technologies in the liberal arts. GIS, or geographic information systems, is mapping on computers. GIS is visualization of geographic data, whether it be from one layer showing demographics taken in the recent census, to many layers that provide information on the surface of the earth (such as soil, topography, or infrastructure), below the surface (the geology), and above the surface (air quality or temperature, for example). GIS is used for analyzing geospatial relationships. One can look at those many layers and make spatial analyses across and between the variables.