The central database in this application is the historic structures GIS database. It represents 967 structures, 39 considered potentially eligible for the National Historic Register, and 4 already in the National Historic Register. Most of these structures date from the 1880's to the mid-twentieth century. 80 structures were built between 1850-1900, 226 were built between 1901-1920, 539 were built between 1921-1940, and 123 were built between 1941-1950. For each of the structures, the database maintains the required Florida standard info for the site file and a photograph in .jpg format. Five structures are missing photographs: AL03974, AL04140, AL04342, AL04468, and AL04552. This will be amended as soon as possible. For each of the architectural styles the database has 2-3 sample video-clips.