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Author: Stewart Dary 200 S. Orange Ave., Suite 1700 Phone: (407) 836-5376 A major component of the long-term reengineering plan of the Orange County Property Appraiser's Office (OCPA) involved the conversion of its property appraisal land base from Vision to ArcInfo. This was performed in a joint venture between OCPA and Safe Software using the Feature Manipulation Engine (FME). The task was accomplished by sidestepping the Vision GIS structures and hitting the underlying relational table directly with the FME to convert the more than four million geometric objects cleanly into ArcInfo. Among the challenges of converting this data set was the sheer volume of data, dealing with a data set that could not be easily spatially partitioned, and cleaning and transferring the County's critical parcel-related information. In addition, the Property Appraiser's Office applied rigorous quality control and assurance procedures to ensure that all information was transferred correctly and to identify data problems on the Vision side for correction before final conversion. This paper will discuss the life cycle of the conversion and the many challenges and successes met along the way. |
