Detail View: Touchton Map Library: Topographical map of the Port Tampa Quadrangle from 1981. The map was produced by the United States Department of the Interior Geological Survey and is of the Florida 7.5 Minute Series (Topographic). The map's subject is noted as Port Tampa, Fla. N2745 - W8230/7.5. Originally mapped, edited and published by the Geological Survey with control by the USGS [United States Geodetic Survey], the NOS/NOAA [National Oceanic and Atmospheric Association], and the Florida Geodetic Survey. The map is based off of aerial photographs from 1954, topographical surveys of 1956, and hydropgraphic data from NOS chart 587 (1952). Areas where only landmark buildings are shown are tinted in red. Revisions to the map are shown in purple based off of aerial photos from 1979, indicating the extension of urban areas. The map was edited and published in 1981. Near the bottom right border there is a "Property of Ohio State University Museum of Zoology" stamp.