In 1992 and 1993, UGSL—along with Field Data Services, Inc. (FDSI) of Denver, Colorado—worked on the Florida Power & Light (FPL) Facilities Graphic Management System (FGMS) data conversion project. This IBM GFIS project involved the conversion of primary electrical facilities on 459 map sheets covering an area of 1,000 square miles representing the populated portion of Dade County (Miami), Florida. Part of the conversion process involved verifying positions of facilities which had been imported from an existing database. These facilities had been roughly geographically located on a grid system. The area contained approximately 800,000 customers and 490,000 cadastral parcels.
FPL’s content, or factual, error rate for the electrical facility files was 0.1 percent. Positional error for field located facilities was not to exceed five feet at a 90% confidence level. Underhill, along with FDSI, met or exceeded these specifications in all deliveries.
Underhill’s translation software was used to convert FPL’s land base (supplied by another conversion vendor in ESRI ASCII format) to IBM IFF. This data was used to then provide geographic referencing for converting electrical facilities. The Underhill software worked quickly and ran on a standard 640K microcomputer. The translator, written in C, produced attribute and graphic IFF records for topographical and cadastral features, building symbols and outlines, map borders and power poles.