Figure 1. An example of a graphical user interface (GUI) which uses window-icon-mouse-pointer (WIMP) technology. 
A panchromatic aerial photograph has been scanned, rectified and overlayed with three types of GIS information (fences, 
contours, and traffic density) from three non-image sources (Arc-Info, Genamap, and Oracle) (Reproduced with 
permission of Stuart Nixon, ER Mapper, San Diego, CA). 
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