说明：  My name is Roger Dunn and I work for the city of Orem, Utah. All of the programmers here have used Borland Delphi for writing database applications since Delphi version 1 or 2. I was hired as the city’s GIS programmer when I didn’t even know what GIS stood for. At the time, our programmers were slowly migrating to Delphi 6 and ArcGIS 8.0 was just about to be released. In the meantime, I learned some Avenue, but concentrated on learning Delphi for the database programming I was also hired to do. In a way, my job consists in bringing our flat IBM databases in sync with our GIS.